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Precise Nuclear Quadrupole Moments of 8B and 13B

Authors:	T. Nagatomo T. Sumikama M. Ogura K. Matsuta Y. Nakashima K. Akutsu T. Iwakoshi H. Fujiwara T. Minamisono M. Fukuda M. Mihara K. Minamisono T. Miyake S. Momota Y. Nojiri A. Kitagawa M. Sasaki M. Torikoshi M. Kanazawa M. Suda M. Hirai S. Sato S. Y. Zhu J. Z. Zhu Y. J. Xu Y. N. Zheng J. R. Alonso G. F. Krebs T. M. Symons

Affiliation:	(1) Department of Physics, Osaka University, Osaka 560-0043, Japan;(2) TRIUMF, Vancouver, Canada, V6T 2A3;(3) Kochi University of Technology, Kochi 782-8502, Japan;(4) National Institute of Radiological Sciences, Chiba 263-0024, Japan;(5) China Institute of Atomic Energy, Beijing, 102413, P.R. China;(6) Lawrence Berkeley Laboratory, Berkeley, CA 94720, USA;(7) Present address: RIKEN, Saitama 351-0198, Japan;(8) Present address: Department of Photonics, Ritsumeikan University, Shiga 525-8577, Japan

Abstract:	The electric quadrupole coupling constants eqQ/h of ⁸B ( $I^{pi } = 2^{ + }$ , T _1/2 = 769 ms) and ¹³B ( $I^{pi } = 3 mathord{left/ {vphantom {3 2}} right. kern-nulldelimiterspace} 2^{ - }$ , T _1/2 = 17.4 ms) in single crystal TiO₂ have been precisely measured by the β-NQR technique. The ratios of these Q moments to Q(¹²B) were determined as ∣Q(⁸B)/Q(¹²B)∣ = 4.882(32) and ∣Q(¹³B)/Q(¹²B)∣ = 2.768(24).

Keywords:	⁸B ¹³B β -NQR eqQ Q moment TiO₂
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