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Title of Journal: Hyperfine Interact

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Abbravation: Hyperfine Interactions

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Springer Netherlands

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DOI

10.1002/ar.1091540402

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ISSN

1572-9540

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Momentum dependence of spin polarization for beta

Authors: S Momota M Mihara D Nishimura M Fukuda Y Kamisho M Wakabayashi K Matsuta S Suzuki M Nagashima Shengyun Zhu Daqing Yuan Yongnan Zheng Zuo Yi Ping Fan T Izumikawa A Kitagawa S Sato M Kanazawa M Torikoshi T Minamisono Y Nakamura K Tashiro A Honma N Yoshida H Shirai T Ohtsubo T Nagatomo H Uenishi K Iwamoto M Yaguchi T Ogura T Ito K Yamamura Y Ichikawa Y Nojiri J R Alonso T J M Symons
Publish Date: 2012/12/19
Volume: 220, Issue: 1-3, Pages: 53-58
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Abstract

In order to investigate the polarization process in charge exchange reactions we observed the momentum and angular distribution as well as the nuclear polarization of a protonrich betaemitting nucleus 28P I   π = 3 +  T 1/2 = 270 msec produced through the reaction 28Si+ 9Be at E = 100 MeV/u by selecting the momentum and the ejection angle An analysis by using double Gaussian functions resolved the observed momentum distribution into two reaction components nucleon knockout and pickup abrasion reactions as suggested in a previous study The behavior of the observed angular distribution and nuclear polarization implies the influence of those two components The momentum dependence of the observed nuclear polarization of 28P could be consistently reproduced by a simple model in which two reaction components are considered The present study also shows that the charge exchange reaction at intermediate energy is a useful method to produce polarized betaemitting nuclei especially for protonrich nuclei

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