Bulletin of the American Physical Society
6th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Sunday–Friday, November 26–December 1 2023; Hawaii, the Big Island
Session F02: Nuclear Reaction II
9:00 AM–11:45 AM,
Thursday, November 30, 2023
Hilton Waikoloa Village
Room: Kona 1
Chair: Alan Wuosmaa, University of Connecticut
Abstract: F02.00001 : Isotopic production of 99Tc via proton- and deuteron-induced reactions and new analytical model for its longitudinal momentum distribution
9:00 AM–9:15 AM
Presenter:
Riku Matsumura
(RIKEN Nishina Center / Saitama University)
Authors:
Riku Matsumura
(RIKEN Nishina Center / Saitama University)
Hideaki Otsu
(RIKEN Nishina Center)
He Wang
(RIKEN Cluster for Pioneering Research)
Hiroyoshi Sakurai
(RIKEN Nishina Center)
Daiki Nishimura
(Tokyo City University)
Hiroyuki Takahashi
(Tokyo City University)
Shoko Takeshige
(RIKEN Nishina Center / Rikkyo University)
Masaomi Tanaka
(RIKEN Nishina Center / Kyushu University)
Yasuhiro Togano
(RIKEN Nishina Center / Rikkyo University)
The experiment was performed at the RIBF. A secondary beam including 99Tc was produced by the in-flight fission of 238U at 345 MeV/nucleon on a 3-mm-thick 9Be target, selected and identified event-by-event using the TOF-Bρ-∆E method. It also included 99mTc (T1/2 = 6 h), which is indistinguishable by the method. Cocktail beams of 99Tc and 99mTc at 114 MeV/nucleon were bombarded on CH2, CD2, and C reaction targets. Backgrounds of carbon from CH2 and CD2 targets and beam-line materials were subtracted by using the C and empty target runs.
For estimating the yield of residual nuclei, a new analytical model was developed to fully reproduce the longitudinal momentum distribution. The asymmetry of the distribution was evaluated quantitatively. In this talk, we will show the model and report the obtained isotopic production cross sections.
[1] H. Wang et al., Phys. Lett. B 754, 104 (2016).
[2] S. Kawase et al., Prog. Theor. Exp. Phys. 2017, 093D03 (2017).
[3] H. Wang et al., Prog. Theor. Exp. Phys. 2017, 021D01 (2017).
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