Title of article
Strength observed in Gamow-Teller resonance plus continuum in the 27Al(p→,n→)
Author/Authors
H. Sakai and T. Wakasa، نويسنده , , H. Sakai، نويسنده , , H. Okamura، نويسنده , , H. Otsu، نويسنده , , S. Fujita، نويسنده , , S. Ishida، نويسنده , , N. Sakamoto، نويسنده , , T. Uesaka، نويسنده , , Y. Satou، نويسنده , , M.B. Greenfield، نويسنده , , K. Hatanaka، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 1998
Pages
6
From page
257
To page
262
Abstract
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.
Keywords
Gamow-Teller strength , Charge exchange reaction , Polarization transfer observables , Gamow-Teller sum rule
Journal title
PHYSICS LETTERS B
Serial Year
1998
Journal title
PHYSICS LETTERS B
Record number
909742
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