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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

Institution:	(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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