C. Glashausser - Academia.edu (original) (raw)

Papers by C. Glashausser

Research paper thumbnail of Energy dependence of the C12(p,p’)12C* reaction from 200 to 800 MeV

Physical Review C, 1994

Differential cross sections and analyzing powers have been measured for inelastic proton excitati... more Differential cross sections and analyzing powers have been measured for inelastic proton excitation of states in 12C up to an excitation energy of 20 MeV. Angular distributions are reported for incoming proton energies of 200, 318, 398, 597, 698, and 800 MeV, typically over the momentum transfer range from 0.5 to 2 fm-1; some of these data have been published

Research paper thumbnail of DIFFUSION ÉLASTIQUE ET INÉLASTIQUE DE PROTONS POLARISÉS A 18,6 MeV

Le Journal De Physique Colloques, 1968

Research paper thumbnail of Investigation of the reaction 24Mg(d,α)22Na with vector polarized deuterons

AIP Conference Proceedings, 1981

Research paper thumbnail of Tensor analyzing powers in the reaction 24Mg(d,α)22Na

AIP Conference Proceedings, 1981

Research paper thumbnail of INELASTIC SCATTERING OF POLARIZED PROTONS AT 20 MeV

Research paper thumbnail of Coupled-channels effects for inelastic scattering of 15 MeV polarized deuterons from Ti and Sm isotopes

Research paper thumbnail of Studies of J Dependence in Neutron Pickup Reactions

Physical Review, 1967

The dependence of the form of angular distributions on the total angular momentum transfer (J dep... more The dependence of the form of angular distributions on the total angular momentum transfer (J dependence) has been studied for the following reactions: Fe56(p, d)Fe55 at 18.5, 20.0, 22.4, 25.7, and 27.5 MeV; Ni58(p, d)Ni57 at 20.0, 25.4, and 27.5 MeV; C12(p, d)C11, S32(p, d)S31, and Pb208(p, d) Pb207 at about 28 MeV and Fe56(He3, alpha)Fe55 at 30 and 40

Research paper thumbnail of Moments of the neutron g 2 structure function at intermediate Q 2

Physical Review C, 2015

We present new experimental results for the 3 He spin structure function g 2 in the resonance reg... more We present new experimental results for the 3 He spin structure function g 2 in the resonance region at Q 2 values between 1.2 and 3.0 (GeV/c) 2. Spin dependent moments of the neutron were then extracted. Our main result, the inelastic contribution to the neutron d 2 matrix element, was found to be small at Q 2 = 2.4 (GeV/c) 2 and in agreement with the Lattice QCD calculation. The Burkhardt-Cottingham sum rule for 3 He and the neutron was tested with the measured data and using the Wandzura-Wilczek relation for the low x unmeasured region.

Research paper thumbnail of Fragmentation of the octupole strength in 205Tl(p,p′)205Tl

Research paper thumbnail of Polarization transfer in the <sup>4</sup>He(e,e'p)<sup>3</sup>H reaction

Polarization transfer in the4He(e,e'p)3H reaction at a Q2 of 0.4 (GeV/c)2 was measured at the... more Polarization transfer in the4He(e,e'p)3H reaction at a Q2 of 0.4 (GeV/c)2 was measured at the Mainz Microtron MAMI. The ratio of the transverse to the longitudinal polarization components of the ejected protons was compared with the same ratio for elastic ep scattering. The results are consistent with a recent fully relativistic calculation which includes a predicted medium modification of the proton form factor based on a quark-meson coupling model.

Research paper thumbnail of Polarization transfer for inclusive proton-nucleus inelastic scattering at 800 MeV

Physical Review C, 1988

ABSTRACT

Research paper thumbnail of Signatures for isoscalar spin transitions excited in (, ') reactions

Research paper thumbnail of Single-particle proton admixtures in core-excited states of 207Bi

Research paper thumbnail of The nuclear spin response to intermediate energy protons

Physics Letters B, 1990

Measurements of the spin-flip probability S,, for inclusive inelastic proton scattering around 30... more Measurements of the spin-flip probability S,, for inclusive inelastic proton scattering around 300 MeV from nuclei between ~2C and 9°Zr show that an enhanced spin response near 40 MeV excitation at q~ 100 MeV/c is a general feature of nuclear structure. Data for 4°Ca at 800 MeV confirm that the enhancement is not a peculiarity of 300 MeV scattering. In addition, measurements in '~Ca up to 75 MeV show that the enhancement cannot be attributed solely to a relatively narrow resonance. Continuum RPA calculations suggest that the enhancement is due to the exhaustion of most S= 0 strength at lower energy and a shift of S= 1 strength to higher energy.

Research paper thumbnail of Quasielastic He3(e,e′p)H2 Reaction at Q2=1.5 GeV2 for Recoil Momenta up to 1 GeV/c

Physical Review Letters, 2005

Research paper thumbnail of Measurement of the Generalized Forward Spin Polarizabilities of the Neutron

Physical Review Letters, 2004

Research paper thumbnail of Observation of Polarization-Analyzing Power Inequality in the Reaction ^{88}Sr(p,p^{′}γ)^{88}Sr Using Polarized Protons

Physical Review Letters, 1972

The difference between the polarization and the analyzing power in the inelastic scattering of pr... more The difference between the polarization and the analyzing power in the inelastic scattering of protons at isobaric analog resonances in 89Y has been determined by measuring the spin-flip probability of a polarized beam. The differences are large, and are sensitive to the structure of the resonances.

Research paper thumbnail of Quark-Hadron Duality in Neutron (He3) Spin Structure

Physical Review Letters, 2008

We present experimental results of the first high-precision test of quark-hadron duality in the s... more We present experimental results of the first high-precision test of quark-hadron duality in the spin-structure function g 1 of the neutron and 3 He using a polarized 3 He target in the fourmomentum-transfer-squared range from 0.7 to 4.0 (GeV/c) 2. Global duality is observed for the spin-structure function g 1 down to at least Q 2 = 1.8 (GeV/c) 2 in both targets. We have also formed the photon-nucleon asymmetry A 1 in the resonance region for 3 He and found no strong Q 2-dependence above 2.2 (GeV/c) 2 .

Research paper thumbnail of Cross-Section Measurement of Charged-Pion Photoproduction from Hydrogen and Deuterium

Physical Review Letters, 2003

We have measured the differential cross section for the γn → π − p and γp → π + n reactions at θc... more We have measured the differential cross section for the γn → π − p and γp → π + n reactions at θcm = 90 • in the photon energy range from 1.1 to 5.5 GeV at Jefferson Lab (JLab). The data at Eγ 3.3 GeV exhibit a global scaling behavior for both π − and π + photoproduction, consistent with the constituent counting rule and the existing π + photoproduction data. Possible oscillations around the scaling value were observed. The cross section ratio of exclusive π − to π + photoproduction at high energy is consistent with the prediction based on one-hard-gluon-exchange diagrams. The data also indicate a resonance structure at a center-of-mass energy near 2.2 GeV.

Research paper thumbnail of Recoil Polarization for Δ Excitation in Pion Electroproduction

Physical Review Letters, 2005

We measured angular distributions of recoil-polarization response functions for neutral pion elec... more We measured angular distributions of recoil-polarization response functions for neutral pion electroproduction for W 1:23 GeV at Q 2 1:0 GeV=c 2 , obtaining 14 separated response functions plus 2 Rosenbluth combinations; of these, 12 have been observed for the first time. Dynamical models do not describe quantities governed by imaginary parts of interference products well, indicating the need for adjusting magnitudes and phases for nonresonant amplitudes. We performed a nearly model-independent multipole analysis and obtained values for Re S 1 =M 1 ÿ6:84 0:15% and Re E 1 =M 1 ÿ2:91 0:19% that are distinctly different from those from the traditional Legendre analysis based upon M 1 dominance and ' 1 truncation.

Research paper thumbnail of Energy dependence of the C12(p,p’)12C* reaction from 200 to 800 MeV

Physical Review C, 1994

Differential cross sections and analyzing powers have been measured for inelastic proton excitati... more Differential cross sections and analyzing powers have been measured for inelastic proton excitation of states in 12C up to an excitation energy of 20 MeV. Angular distributions are reported for incoming proton energies of 200, 318, 398, 597, 698, and 800 MeV, typically over the momentum transfer range from 0.5 to 2 fm-1; some of these data have been published

Research paper thumbnail of DIFFUSION ÉLASTIQUE ET INÉLASTIQUE DE PROTONS POLARISÉS A 18,6 MeV

Le Journal De Physique Colloques, 1968

Research paper thumbnail of Investigation of the reaction 24Mg(d,α)22Na with vector polarized deuterons

AIP Conference Proceedings, 1981

Research paper thumbnail of Tensor analyzing powers in the reaction 24Mg(d,α)22Na

AIP Conference Proceedings, 1981

Research paper thumbnail of INELASTIC SCATTERING OF POLARIZED PROTONS AT 20 MeV

Research paper thumbnail of Coupled-channels effects for inelastic scattering of 15 MeV polarized deuterons from Ti and Sm isotopes

Research paper thumbnail of Studies of J Dependence in Neutron Pickup Reactions

Physical Review, 1967

The dependence of the form of angular distributions on the total angular momentum transfer (J dep... more The dependence of the form of angular distributions on the total angular momentum transfer (J dependence) has been studied for the following reactions: Fe56(p, d)Fe55 at 18.5, 20.0, 22.4, 25.7, and 27.5 MeV; Ni58(p, d)Ni57 at 20.0, 25.4, and 27.5 MeV; C12(p, d)C11, S32(p, d)S31, and Pb208(p, d) Pb207 at about 28 MeV and Fe56(He3, alpha)Fe55 at 30 and 40

Research paper thumbnail of Moments of the neutron g 2 structure function at intermediate Q 2

Physical Review C, 2015

We present new experimental results for the 3 He spin structure function g 2 in the resonance reg... more We present new experimental results for the 3 He spin structure function g 2 in the resonance region at Q 2 values between 1.2 and 3.0 (GeV/c) 2. Spin dependent moments of the neutron were then extracted. Our main result, the inelastic contribution to the neutron d 2 matrix element, was found to be small at Q 2 = 2.4 (GeV/c) 2 and in agreement with the Lattice QCD calculation. The Burkhardt-Cottingham sum rule for 3 He and the neutron was tested with the measured data and using the Wandzura-Wilczek relation for the low x unmeasured region.

Research paper thumbnail of Fragmentation of the octupole strength in 205Tl(p,p′)205Tl

Research paper thumbnail of Polarization transfer in the <sup>4</sup>He(e,e'p)<sup>3</sup>H reaction

Polarization transfer in the4He(e,e'p)3H reaction at a Q2 of 0.4 (GeV/c)2 was measured at the... more Polarization transfer in the4He(e,e'p)3H reaction at a Q2 of 0.4 (GeV/c)2 was measured at the Mainz Microtron MAMI. The ratio of the transverse to the longitudinal polarization components of the ejected protons was compared with the same ratio for elastic ep scattering. The results are consistent with a recent fully relativistic calculation which includes a predicted medium modification of the proton form factor based on a quark-meson coupling model.

Research paper thumbnail of Polarization transfer for inclusive proton-nucleus inelastic scattering at 800 MeV

Physical Review C, 1988

ABSTRACT

Research paper thumbnail of Signatures for isoscalar spin transitions excited in (, ') reactions

Research paper thumbnail of Single-particle proton admixtures in core-excited states of 207Bi

Research paper thumbnail of The nuclear spin response to intermediate energy protons

Physics Letters B, 1990

Measurements of the spin-flip probability S,, for inclusive inelastic proton scattering around 30... more Measurements of the spin-flip probability S,, for inclusive inelastic proton scattering around 300 MeV from nuclei between ~2C and 9°Zr show that an enhanced spin response near 40 MeV excitation at q~ 100 MeV/c is a general feature of nuclear structure. Data for 4°Ca at 800 MeV confirm that the enhancement is not a peculiarity of 300 MeV scattering. In addition, measurements in '~Ca up to 75 MeV show that the enhancement cannot be attributed solely to a relatively narrow resonance. Continuum RPA calculations suggest that the enhancement is due to the exhaustion of most S= 0 strength at lower energy and a shift of S= 1 strength to higher energy.

Research paper thumbnail of Quasielastic He3(e,e′p)H2 Reaction at Q2=1.5 GeV2 for Recoil Momenta up to 1 GeV/c

Physical Review Letters, 2005

Research paper thumbnail of Measurement of the Generalized Forward Spin Polarizabilities of the Neutron

Physical Review Letters, 2004

Research paper thumbnail of Observation of Polarization-Analyzing Power Inequality in the Reaction ^{88}Sr(p,p^{′}γ)^{88}Sr Using Polarized Protons

Physical Review Letters, 1972

The difference between the polarization and the analyzing power in the inelastic scattering of pr... more The difference between the polarization and the analyzing power in the inelastic scattering of protons at isobaric analog resonances in 89Y has been determined by measuring the spin-flip probability of a polarized beam. The differences are large, and are sensitive to the structure of the resonances.

Research paper thumbnail of Quark-Hadron Duality in Neutron (He3) Spin Structure

Physical Review Letters, 2008

We present experimental results of the first high-precision test of quark-hadron duality in the s... more We present experimental results of the first high-precision test of quark-hadron duality in the spin-structure function g 1 of the neutron and 3 He using a polarized 3 He target in the fourmomentum-transfer-squared range from 0.7 to 4.0 (GeV/c) 2. Global duality is observed for the spin-structure function g 1 down to at least Q 2 = 1.8 (GeV/c) 2 in both targets. We have also formed the photon-nucleon asymmetry A 1 in the resonance region for 3 He and found no strong Q 2-dependence above 2.2 (GeV/c) 2 .

Research paper thumbnail of Cross-Section Measurement of Charged-Pion Photoproduction from Hydrogen and Deuterium

Physical Review Letters, 2003

We have measured the differential cross section for the γn → π − p and γp → π + n reactions at θc... more We have measured the differential cross section for the γn → π − p and γp → π + n reactions at θcm = 90 • in the photon energy range from 1.1 to 5.5 GeV at Jefferson Lab (JLab). The data at Eγ 3.3 GeV exhibit a global scaling behavior for both π − and π + photoproduction, consistent with the constituent counting rule and the existing π + photoproduction data. Possible oscillations around the scaling value were observed. The cross section ratio of exclusive π − to π + photoproduction at high energy is consistent with the prediction based on one-hard-gluon-exchange diagrams. The data also indicate a resonance structure at a center-of-mass energy near 2.2 GeV.

Research paper thumbnail of Recoil Polarization for Δ Excitation in Pion Electroproduction

Physical Review Letters, 2005

We measured angular distributions of recoil-polarization response functions for neutral pion elec... more We measured angular distributions of recoil-polarization response functions for neutral pion electroproduction for W 1:23 GeV at Q 2 1:0 GeV=c 2 , obtaining 14 separated response functions plus 2 Rosenbluth combinations; of these, 12 have been observed for the first time. Dynamical models do not describe quantities governed by imaginary parts of interference products well, indicating the need for adjusting magnitudes and phases for nonresonant amplitudes. We performed a nearly model-independent multipole analysis and obtained values for Re S 1 =M 1 ÿ6:84 0:15% and Re E 1 =M 1 ÿ2:91 0:19% that are distinctly different from those from the traditional Legendre analysis based upon M 1 dominance and ' 1 truncation.