TY - JOUR
T1 - Strength observed in Gamow-Teller resonance plus continuum in the 27Al(→p, →n) reaction at 295 MeV
AU - Wakasa, T.
AU - Sakai, H.
AU - Okamura, H.
AU - Otsu, H.
AU - Fujita, S.
AU - Ishida, S.
AU - Sakamoto, N.
AU - Uesaka, T.
AU - Satou, Y.
AU - Greenfield, M. B.
AU - Hatanaka, K.
N1 - Funding Information:
We would like to thank T. Niizeki for valuable discussions and for providing the experimental data of Ref. [29] before publication, K. Muto for the calculation of one-body transition amplitudes, and Toru Suzuki for helpful discussions and suggestions. This work is supported in part by the Grants-in-Aid for Scientific Research Nos. 6342007 and 0442004 of the Ministry of Education, Science, Sports and Culture of Japan.
PY - 1998/5/7
Y1 - 1998/5/7
N2 - The double differential cross sections for θlab between 0.0° and 14.7° and the polarization transfer coefficient DNN(0°) for the 27Al(→p, →n) reaction have been measured at a bombarding energy of 295 MeV. A multipole decomposition technique is applied for the cross section data to extract L = 0, 1, 2, and 3 contributions. The Gamow-Teller (GT) strength B(GT) deduced from the L = 0 contribution is compared with the B(GT) values calculated in a full sd shell-model space. The sum of B(GT) values up to 20 MeV excitation is Sβ = 4.0 ± 0.1 ± 0.1. A fairly large L = 0 contribution is observed in the continuum region up to 50 MeV, which could be in part ascribed to the quenched GT strength. A limit on the effect that the Δ(1232)-isobar nucleon-hole admixture has upon the GT strength is estimated.
AB - The double differential cross sections for θlab between 0.0° and 14.7° and the polarization transfer coefficient DNN(0°) for the 27Al(→p, →n) reaction have been measured at a bombarding energy of 295 MeV. A multipole decomposition technique is applied for the cross section data to extract L = 0, 1, 2, and 3 contributions. The Gamow-Teller (GT) strength B(GT) deduced from the L = 0 contribution is compared with the B(GT) values calculated in a full sd shell-model space. The sum of B(GT) values up to 20 MeV excitation is Sβ = 4.0 ± 0.1 ± 0.1. A fairly large L = 0 contribution is observed in the continuum region up to 50 MeV, which could be in part ascribed to the quenched GT strength. A limit on the effect that the Δ(1232)-isobar nucleon-hole admixture has upon the GT strength is estimated.
UR - http://www.scopus.com/inward/record.url?scp=0348116221&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0348116221&partnerID=8YFLogxK
U2 - 10.1016/S0370-2693(98)00320-7
DO - 10.1016/S0370-2693(98)00320-7
M3 - Article
AN - SCOPUS:0348116221
SN - 0370-2693
VL - 426
SP - 257
EP - 262
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 3-4
ER -