Measurements of production cross sections of 10Be and 26Al by 120 GeV and 392 MeV proton bombardment of 89Y, 159Tb, and natCu targets

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:361

Article

Sekimoto, S.¹  Okumura, S.¹  Yashima, H.¹  Matsushi, Y.²  Matsuzaki, H.³  Matsumura, H.⁴  Toyoda, A.⁴  Oishi, K.⁵  Matsuda, N.⁶  Kasugai, Y.⁶  Sakamoto, Y.⁷  Nakashima, H.⁶  Boehnlein, D.⁸  Coleman, R.⁸  Lauten, G.⁸  Leveling, A.⁸  Mokhov, N.⁸  Ramberg, E.⁸  Soha, A.⁸  Vaziri, K.⁸  Ninomiya, K.⁹  Omoto, T.⁹  Shima, T.¹⁰  Takahashi, N.⁹  Shinohara, A.⁹  Caffee, M. W.^11,12  Welten, K. C.¹³  Nishiizumi, K.¹³  Shibata, S.¹⁴  Ohtsuki, T.¹ 

[1] Kyoto Univ, Inst Res Reactor, Kumatori, Osaka 5900494, Japan

[2] Kyoto Univ, Disaster Prevent Res Inst, Uji, Kyoto 6110011, Japan

[3] Univ Tokyo, Sch Engn, Dept Nucl Engn & Management, Bunkyo Ku, Tokyo 1130032, Japan

[4] High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan

[5] Shimizu Corp, Tokyo 1358530, Japan

[6] Japan Atom Energy Agcy, Tokai, Ibaraki 3191195, Japan

[7] ATOX Co Ltd, Kashiwa, Chiba 2770861, Japan

[8] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

[9] Osaka Univ, Grad Sch Sci, Toyonaka, Osaka 5600043, Japan

[10] Osaka Univ, Nucl Phys Res Ctr, Suita, Osaka 5670047, Japan

[11] Purdue Univ, Dept Phys & Astron, W Lafayette, IN 47907 USA

[12] Purdue Univ, Dept Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA

[13] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

[14] RIKEN Nishina Ctr Accelerator Based Sci, Wako, Saitama 3510198, Japan

关键词: Be-10;    Al-26;    Fragmentation process;    Binding energy;    120 GeV proton;   

DOI  :  10.1016/j.nimb.2015.08.001

来源: Elsevier

【 摘 要 】

The production cross sections of Be-10 and Al-26 were measured by accelerator mass spectrometry using Y-89, Tb-159, and Cu-nat targets bombarded by protons with energies E-p of 120 GeV and 392 MeV. The production cross sections obtained for Be-10 and Al-26 were compared with those previously reported using E-p = 50 MeV-24 GeV and various targets. It was found that the production cross sections of Be-10 monotonically increased with increasing target mass number when the proton energy was greater than a few GeV. On the other hand, it was also found that the production cross sections of Be-10 decreased as the target mass number increased from that of carbon to those near the mass numbers of nickel and zinc when the proton energy was below approximately 1 GeV. They also increased as the target mass number increased from near those of nickel and zinc to that of bismuth, in the same proton energy range. Similar results were observed in the production cross sections of Al-26, though the absolute values were quite different between Be-10 and Al-26. The difference between these production cross sections may depend on the impact parameter (nuclear radius) and/or the target nucleus stiffness. (C) 2015 Elsevier B.V. All rights reserved.

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