Versatile production method of thin targets supported by PVA

Y. Shimbara, Y. Fujita, M. Hamaguchi, E. Mochizuki, T. Adachi, G. P.A. Berg, H. Fujimura, H. Fujita, K. Fujita, K. Hara, K. Hatanaka, J. Kamiya, K. Kawase, T. Kawabata, Y. Kitamura, K. Nakanishi, N. Sakamoto, Y. Sakemi, Y. Shimizu, Y. TameshigeM. Uchida, T. Wakasa, K. Yamasaki, M. Yoshifuku, M. Yosoi

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Thin self-supporting targets are indispensable in high energy-resolution studies using a magnetic spectrometer. However, nuclear targets of alkaline and alkaline-earth metal or halogen isotopes are not easily available. In order to produce thin target foils of these elements for the use in charge-exchange reactions, we take advantage of the fact that the stable isotopes of these elements have relatively small negative Q values, while 12C and 16O have large negative Q values. Therefore, even if organic compounds containing carbon and oxygen are used as supporting material, clean spectra on alkaline and alkaline-earth metal or halogen targets can be obtained up to the excitation energies of Q-value differences. A technique to produce thin foils of the chemical compounds Na2CO3,K 2CO3,CaCO3 and CaCl2 was developed using polyvinylalcohol as supporting material. Foils with a total thickness of 1-2 mg/cm2 were produced and used as targets in a (3He,t) reaction study at an incident energy of 420 MeV. Owing to the small contributions of energy-loss differences of beam and reaction products in such thin targets, a very good resolution of ΔE/E=7×10-5 was achieved in combination with a high-resolution magnetic spectrometer.

Original languageEnglish
Pages (from-to)205-211
Number of pages7
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume522
Issue number3
DOIs
Publication statusPublished - 2004 Apr 21

Keywords

  • Alkaline metal target
  • Charge-exchange reaction
  • Halogen target
  • Reaction Q value

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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