arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0707.2840nucl-ex
收藏

420 MeV的(3 He,t)反应对弱跃迁强度的提取

On the extraction of weak transition strengths via the (3He,t) reaction at 420 MeV

R. G. T Zegers, T. Adachi, H. Akimune, Sam M. Austin, A. M. van den Berg, B. A. Brown, Y. Fujita, M. Fujiwara, S. Gales, C. J. Guess, M. N. Harakeh, H. Hashimot… 展开作者

R. G. T Zegers, T. Adachi, H. Akimune, Sam M. Austin, A. M. van den Berg, B. A. Brown, Y. Fujita, M. Fujiwara, S. Gales, C. J. Guess, M. N. Harakeh, H. Hashimoto, K. Hatanaka, R. Hayami, G. W. Hitt, M. E. Howard, M. Itoh, T. Kawabata, K. Kawase, M. Kinoshita, M. Matsubara, K. Nakanishi, S. Nakayama, S. Okumura, T. Ohta, Y. Sakemi, Y. Shimbara, Y. Shimizu, C. Scholl, C. Simenel, Y. Tameshige, A. Tamii, M. Uchida, T. Yamagata, M. Yosoi

摘要:

用420 MeV(~ 3 He,t)反应测量了~(12)C,~(13)C,~(18)O,~(26)Mg,~(58)Ni,~(60)Ni,~(90)Zr,~(118)Sn,~(120)Sn和~(208)Pb靶上已知弱强度跃迁的微分截面。使用这些数据,它是示出的强度和截面之间的比例,该探头遵循简单的趋势作为质量数的函数。这些趋势可以用来确定有把握的伽莫夫-泰勒强度分布的比例不能通过β衰变强度校准的核。虽然扭曲波玻恩近似的理论计算高估了数据,但它们使人们能够理解主要的实验特征,并预测偏离在某些跃迁中观察到的简单趋势。

英文摘要:

Differential cross sections for transitions of known weak strength were measured with the (3He,t) reaction at 420 MeV on targets of 12C, 13C, 18O, 26Mg, 58Ni, 60Ni, 90Zr, 118Sn, 120Sn and 208Pb. Using this data, it is shown the proportionalities between strengths and cross sections for this probe follow simple trends as a function of mass number. These trends can be used to confidently determine Gamow-Teller strength distributions in nuclei for which the proportionality cannot be calibrated via beta-decay strengths. Although theoretical calculations in distorted-wave Born approximation overestimate the data, they allow one to understand the main experimental features and to predict deviations from the simple trends observed in some of the transitions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑