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Title: Half-life of {sup 184}Re populated by the ({gamma},n) reaction from laser Compton scattering {gamma} rays at the electron storage ring NewSUBARU

Abstract

We report a half-life of the ground state of {sup 184}Re populated by the {sup 185}Re({gamma},n){sup 184}Re reaction from laser Compton scattering {gamma} rays generated through relativistic engineering. The {gamma} rays are provided at the electron storage ring NewSUBARU. The previous experiment using deuteron-induced reactions has yielded a recommended half-life of the 3{sup -} ground state of {sup 184}Re of 38.0{+-}0.5 d, including a possible contribution from the 8{sup +} isomer (T{sub 1/2}=169{+-}8 d) of {sup 184}Re since the presence of the isomer was not known at that time. In contrast, the ({gamma},n) reaction has an advantage to selectively populate the ground state because this reaction does not bring large angular momentum. The measured half-life of 35.4{+-}0.7 d is shorter than the previous half-life by about 7%. This difference is crucial for applications using the activation method.

Authors:
 [1];  [2]; ; ;  [3]; ;  [1]; ; ; ;  [4];  [5];  [6];  [2];  [1];  [2]
  1. Kansai Photon Science Institute, Japan Atomic Energy Agency, Kizu, Kyoto 619-0215 (Japan)
  2. (Japan)
  3. University of Hyogo, Hyogo 678-1205 (Japan)
  4. Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047 (Japan)
  5. Advanced Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195 (Japan)
  6. National Astronomical Observatory, Osawa, Mitaka, Tokyo 181-8588 (Japan)
Publication Date:
OSTI Identifier:
20864244
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 74; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevC.74.065802; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ANGULAR MOMENTUM; COMPTON EFFECT; DEUTERONS; ELECTRONS; GAMMA RADIATION; GROUND STATES; HALF-LIFE; LASER RADIATION; PHOTONUCLEAR REACTIONS; RELATIVISTIC RANGE; RHENIUM 184; RHENIUM 185; STORAGE RINGS

Citation Formats

Hayakawa, T., National Astronomical Observatory, Osawa, Mitaka, Tokyo 181-8588, Miyamoto, S., Horikawa, K., Mochizuki, T., Hayashi, Y., Kando, M., Kawase, K., Nakanishi, K., Hashimoto, H., Ohta, T., Chiba, S., Kajino, T., Department of Astronomy, School of Science, University of Tokyo, Tokyo 113-0033, Fujiwara, M., and Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047. Half-life of {sup 184}Re populated by the ({gamma},n) reaction from laser Compton scattering {gamma} rays at the electron storage ring NewSUBARU. United States: N. p., 2006. Web. doi:10.1103/PHYSREVC.74.065802.
Hayakawa, T., National Astronomical Observatory, Osawa, Mitaka, Tokyo 181-8588, Miyamoto, S., Horikawa, K., Mochizuki, T., Hayashi, Y., Kando, M., Kawase, K., Nakanishi, K., Hashimoto, H., Ohta, T., Chiba, S., Kajino, T., Department of Astronomy, School of Science, University of Tokyo, Tokyo 113-0033, Fujiwara, M., & Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047. Half-life of {sup 184}Re populated by the ({gamma},n) reaction from laser Compton scattering {gamma} rays at the electron storage ring NewSUBARU. United States. doi:10.1103/PHYSREVC.74.065802.
Hayakawa, T., National Astronomical Observatory, Osawa, Mitaka, Tokyo 181-8588, Miyamoto, S., Horikawa, K., Mochizuki, T., Hayashi, Y., Kando, M., Kawase, K., Nakanishi, K., Hashimoto, H., Ohta, T., Chiba, S., Kajino, T., Department of Astronomy, School of Science, University of Tokyo, Tokyo 113-0033, Fujiwara, M., and Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047. Fri . "Half-life of {sup 184}Re populated by the ({gamma},n) reaction from laser Compton scattering {gamma} rays at the electron storage ring NewSUBARU". United States. doi:10.1103/PHYSREVC.74.065802.
@article{osti_20864244,
title = {Half-life of {sup 184}Re populated by the ({gamma},n) reaction from laser Compton scattering {gamma} rays at the electron storage ring NewSUBARU},
author = {Hayakawa, T. and National Astronomical Observatory, Osawa, Mitaka, Tokyo 181-8588 and Miyamoto, S. and Horikawa, K. and Mochizuki, T. and Hayashi, Y. and Kando, M. and Kawase, K. and Nakanishi, K. and Hashimoto, H. and Ohta, T. and Chiba, S. and Kajino, T. and Department of Astronomy, School of Science, University of Tokyo, Tokyo 113-0033 and Fujiwara, M. and Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047},
abstractNote = {We report a half-life of the ground state of {sup 184}Re populated by the {sup 185}Re({gamma},n){sup 184}Re reaction from laser Compton scattering {gamma} rays generated through relativistic engineering. The {gamma} rays are provided at the electron storage ring NewSUBARU. The previous experiment using deuteron-induced reactions has yielded a recommended half-life of the 3{sup -} ground state of {sup 184}Re of 38.0{+-}0.5 d, including a possible contribution from the 8{sup +} isomer (T{sub 1/2}=169{+-}8 d) of {sup 184}Re since the presence of the isomer was not known at that time. In contrast, the ({gamma},n) reaction has an advantage to selectively populate the ground state because this reaction does not bring large angular momentum. The measured half-life of 35.4{+-}0.7 d is shorter than the previous half-life by about 7%. This difference is crucial for applications using the activation method.},
doi = {10.1103/PHYSREVC.74.065802},
journal = {Physical Review. C, Nuclear Physics},
number = 6,
volume = 74,
place = {United States},
year = {Fri Dec 15 00:00:00 EST 2006},
month = {Fri Dec 15 00:00:00 EST 2006}
}