Incomplete fusion reaction producing Pa nuclides in the 232Th + 7Li reaction
Author:
Teranishi Kakeru1, Morita Ryoga1, Hayakawa Yuta1, Sakaguchi Aya2, Nakajima Akihisa3, Komori Yukiko4, Yokokita Takuya4, Mori Daiki4, Haba Hiromitsu4, Yokoyama Akihiko5
Affiliation:
1. Graduate School of Natural Science and Technology , Kanazawa University , Kakuma , Kanazawa , Ishikawa 920-1192 , Japan 2. Institute of Pure and Applied Science, University of Tsukuba, 1-1-1 Tennodai , Tsukuba , Ibaraki 305-8577 , Japan 3. Graduate School of Science and Technology, University of Tsukuba , 1-1-1 Tennodai , Tsukuba , Ibaraki 305-8577 , Japan 4. Nishina Center for Accelerator-Based Science, RIKEN , Wako , Saitama 351-0198 , Japan 5. Institute of Science and Engineering, Kanazawa University , Kakuma , Kanazawa , Ishikawa 920-1192 , Japan
Abstract
Abstract
The 237Np (t
1/2 = 2.1 × 106 y) nuclide is produced in nuclear facilities. Its investigation is relevant to earth sciences as concerns environmental pollution and material circulation. We expected that this nuclide should be able to be analyzed by mass spectrometry with a neptunium tracer as a spike, such as that of 236gNp (t
1/2 = 1.5 × 105 y). Our research group has collected fundamental data for cross-sections of the 232Th + 7Li reaction for use in spike production. In addition to the complete fusion reaction, incomplete fusion also occurs, especially in the reaction of 7Li, which splits into α and t, and only a part of the projectile fuses with the target nucleus. In this study, the excitation functions of Pa isotopes, as products of the incomplete fusion reaction, were measured. The reaction mechanism is discussed by comparing the experimental values with those calculated using the EMPIRE code. In addition, we investigated the effect of incomplete fusion reaction on the entire reaction.
Funder
University of Tokyo Japan Society for the Promotion of Science
Publisher
Walter de Gruyter GmbH
Subject
Physical and Theoretical Chemistry
Reference16 articles.
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