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	Production of Ba Metastable State via Superradiance
掲載誌名	正式名：Journal of the Physical Society of Japan 略　 称：J. Phys. Soc. Jpn
巻・号・頁	83(4),pp.044301-1-044301-9
著者・共著者	Chiaki Ohae, Atsushi Fukumi, Susumu Kuma, Yuki Miyamoto, Kyo Nakajima, Itsuo Nakano, Hajime Nanjo, Noboru Sasao, Satoshi Uetake, Tomonari Wakabayashi, Akihiro Yoshimi, Koji Yoshimura, and Motohiko Yoshimura
発行年月	2014/04
概要	We describe in this paper a fast and efficient method of producing a high density of barium (Ba) atoms in the 1D2 metastable state, which is a candidate initial state for a new class of cooperative and coherent optical process called paired superradiance (PSR). In the experiment, Ba atoms are excited first by laser light to the 1P1 state and then brought to the desired state 1D2 via radiative transition in the superradiance (SR) mode. It is found that a production efficiency (from 1S0 to 1D2) of more than 30% is achieved within a time interval of a few nanoseconds for a Ba density n > 1019m-3. Several key features of SR important for future PSR experiments are also studied.