Total Spin Transfer in Continuum for 90Zr(p,n) Reaction at 295 MeV

Tomotsugu Wakasa; Hideyuki Sakai; Hiroyuki Okamura; Hideaki Otsu; Takamasa Nonaka; Tetsuya Ohnishi; Kentaro Yako; Kimiko Sekiguchi; Satoshi Fujita; Tomohiro Uesaka; Yoshiteru Satou; Satoru Ishida; Naruhiko Sakamoto; Mark B. Greenfield; Kichiji Hatanaka

doi:10.1143/jpsj.73.1611

Total Spin Transfer in Continuum for ⁹⁰Zr(p,n) Reaction at 295 MeV

Tomotsugu Wakasa, Hideyuki Sakai, Hiroyuki Okamura, Hideaki Otsu, Takamasa Nonaka, Tetsuya Ohnishi, Kentaro Yako, Kimiko Sekiguchi, Satoshi Fujita, Tomohiro Uesaka, Yoshiteru Satou, Satoru Ishida, Naruhiko Sakamoto, Mark B. Greenfield, Kichiji Hatanaka

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Keywords: total spin transfer, multipole decomposition, Gamow–Teller strength, Gamow–Teller sum rule

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2004 Volume 73 Issue 7 Pages 1611-1614

DOI https://doi.org/10.1143/jpsj.73.1611

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Abstract

A complete set of polarization transfer observables has been measured for the ⁹⁰Zr(p,n) reaction at T_p=295 MeV and θ_lab=0°. The measurement can yield the total spin transfer Σ(0°) which is independent of nuclear reaction mechanisms such as the effective nucleon–nucleon interaction or distortions. The deduced Σ(0°) values indicate the strong spin-flip characteristics of the continuum up to 50 MeV excitation. A predominance of unnatural-parity transitions in the continuum is also observed from polarization transfer observables.

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