2015年4月
Different mechanism of two-proton emission from proton-rich nuclei Al-23 and Mg-22
PHYSICS LETTERS B
- 巻
- 743
- 号
- 開始ページ
- 306
- 終了ページ
- 309
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.physletb.2015.02.066
- 出版者・発行元
- ELSEVIER SCIENCE BV
Two-proton relative momentum (q(pp)) and opening angle (theta(pp)) distributions from the three-body decay of two excited proton-rich nuclei, namely Al-23 --> p + p + Na-21 and Mg-22 --> p + p + Ne-20, have been measured with the projectile fragment separator (RIPS) at the RIKEN RI Beam Factory. An evident peak at q(pp) similar to 20 MeV/c as well as a peak in theta(pp) around 30 degrees are seen in the two-proton break-up channel from a highly-excited Mg-22. In contrast, such peaks are absent for the Al-23 case. It is concluded that the two-proton emission mechanism of excited Mg-22 is quite different from the Al-23 case, with the former having a favorable diproton emission component at a highly excited state and the latter dominated by the sequential decay process. (C) 2015 The Authors. Published by Elsevier B.V.
- リンク情報
- ID情報
-
- DOI : 10.1016/j.physletb.2015.02.066
- ISSN : 0370-2693
- eISSN : 1873-2445
- Web of Science ID : WOS:000352147500047