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Titolo:
LIFETIMES OF LAMBDA-HYPERNUCLEI UP TO FE-LAMBDA
Autore:
BHANG HC; AJIMURA S; AOKI K; HASEGAWA T; HASHIMOTO O; HOTCHI H; KIM YD; KISHIMOTO T; MAEDA K; NOUMI H; OHTA Y; OMATA K; OUTA H; PARK H; SATO Y; SEKIMOTO M; SHIBATA T; TAKAHASHI T; YOUN M;
Indirizzi:
SEOUL NATL UNIV,DEPT PHYS SEOUL 151742 SOUTH KOREA TOHOKU UNIV,DEPT PHYS SENDAI MIYAGI 98077 JAPAN KEK,HIGH ENERGY ACCELERATOR RES ORG TSUKUBA IBARAKI 305 JAPAN OSAKA UNIV,DEPT PHYS OSAKA 660 JAPAN UNIV TOKYO,GRAD SCH SCI TOKYO 113 JAPAN
Titolo Testata:
Nuclear physics. A
fascicolo: 1-2, volume: 639, anno: 1998,
pagine: 269 - 278
SICI:
0375-9474(1998)639:1-2<269:LOLUTF>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
WEAK DECAY; C-12(LAMBDA);
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
18
Recensione:
Indirizzi per estratti:
Citazione:
H.C. Bhang et al., "LIFETIMES OF LAMBDA-HYPERNUCLEI UP TO FE-LAMBDA", Nuclear physics. A, 639(1-2), 1998, pp. 269-278

Abstract

We have observed that the global behavior of the lifetime of a Lambdahyperon in nuclear matter is almost mass independent. Its lifetime decreases slightly from that of a free Lambda and quickly saturates at similar to 80% of tau(Lambda) in free space as the mass number increases. We have determined the lifetimes of three Lambda hypernuclei as tau(C-12(Lambda)g.s.) = 231 +/- 15 ps, tau(Si-28(Lambda)g.s.) = 206 +/- 112 ps and tau({Fe-56(Lambda)}) = 215(-13)(+14) ps. The hypernuclei were produced by the (pi(+), K+) reaction and identified by the SKS spectrometer at the KEK 12 GeV PS. The lifetimes were obtained by a direct measurement of the production time of a hypernucleus and its decay time with two sets of timing/range counters. These are the first lifetimeresults of Lambda hypernuclei over this broad mass range with the explicit identification of the produced hypernuclei.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 08/08/20 alle ore 08:56:31