フクミ　アツシ   Atsushi Fukumi   福見　敦    所属   川崎医療福祉大学  医療技術学部 診療放射線技術学科    職種   准教授
論文種別	原著
言語種別	英語
査読の有無	査読あり
表題	Coherence decay measurement of v = 2 vibrons in solid parahydrogen
掲載誌名	正式名：Journal of Chemical Physics 略　 称：J. Chem. Phys. ISSNコード：00219606/10897690
巻・号・頁	138(2),pp.1-6
著者・共著者	Susumu Kuma, Yuki Miyamoto, Kyo Nakajima, Atsushi Fukumi, Kentarou Kawaguchi, Itsuo Nakano, Noboru Sasao, Minoru Tanaka, Jian Tang, Takashi Taniguchi, Satoshi Uetake, Tomonari Wakabayashi, Akihiro Yoshimi, Motohiko Yoshimura
担当区分	責任著者
発行年月	2013/01
概要	The coherence decay of the v = 2 vibrational state (vibrons) of solid parahydrogen was measured via time-resolved coherent anti-Stokes Raman spectroscopy. We found that the decay curve has a non-exponential time profile in the time scale of 200 ns at a low temperature below 5 K and a low orthohydrogen impurity concentration (∼0.01%). This behavior, as also observed in the case of the v = 1 vibrons, represents a signature of band structure of the v = 2 state in the solid phase. The maximum coherence decay time of 50 ns in an exponential part was achieved, which shows excellence of the v = 2 state for coherent processes. We also found that finite temperatures, orthohydrogen impurities, and other structural inhomogeneity accelerate the decay, hiding the non-exponential feature of the vibron band.