Gamow-teller strength in the continuum and quenching problem

✍ Scribed by H. Sakai; T. Wakasa; H. Okamura; H. Otsu; T. Uesaka; N. Sakamoto; Y. Satou; K. Hatanaka

• Book ID: 104334091
• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 211 KB
• Volume: 654
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(00)88537-1

✦ Synopsis

Differential cross sections at 01a b = 0.0 ° 12.3 ° and a complete set of polarization transfer observables at 0,~b = 0.0 ° are measured for the 9°Zr(p, n) reaction at Tp = 295 MeV. A multipole decomposition analysis (MDA) technique is applied to the cross sections to deduce the Gamow-Teller (GT) strength B(GT). The obtained SZ-= ~2 B(GT) value is 28.0 4-1.6. The total spin transfer E is obtained for the continuum by using polarization transfer measurements. The SZ -S~+ value is deduced to be 27.0 and this is 90% of Ikeda's sum rule value of 3(N -Z)=30. Thus the quenching of the GT strength is small and the quenching mechanism due to the AN-admixture seems to play a minor role.