Fission of heavy hypernuclei formed in antiproton annihilation | Zendy

T. A. Armstrong | Zendy; J.P. Bocquet | Zendy; G. Ericsson | Zendy; T. Johansson | Zendy; T. Krogulski | Zendy; R. A. Lewis | Zendy; F. Malek | Zendy; MarieChristine Maurel | Zendy; E. Monnand | Zendy; J. Mougey | Zendy; H. Nifenecker | Zendy; J. Passaneau | Zendy; Paul B. Perrin | Zendy; S.M. Polikanov | Zendy; M. Rey-Campagnolle | Zendy; C. Ristori | Zendy; G. A. Smith | Zendy; G. Tibell | Zendy

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Fission of heavy hypernuclei formed in antiproton annihilation

Author(s) -

T. A. Armstrong,

J.P. Bocquet,

G. Ericsson,

T. Johansson,

T. Krogulski,

R. A. Lewis,

F. Malek,

MarieChristine Maurel,

E. Monnand,

J. Mougey,

H. Nifenecker,

J. Passaneau,

Paul B. Perrin,

S.M. Polikanov,

M. Rey-Campagnolle,

C. Ristori,

G. A. Smith,

G. Tibell

Publication year - 1993

Publication title -

physical review c

Language(s) - English

Resource type - Journals

eISSN - 1089-490X

pISSN - 0556-2813

DOI - 10.1103/physrevc.47.1957

Subject(s) - physics , antiproton , fission , annihilation , nuclear physics , multiplicity (mathematics) , recoil , hyperon , lambda , particle physics , atomic physics , hadron , neutron , proton , quantum mechanics , mathematical analysis , mathematics

Heavy hypernuclei are produced in the annihilation of antiprotons in [sup 238]U. The delayed fission of heavy hypernuclei and hypernuclei of fission fragments are observed by using the recoil-distance method in combination with measurement of secondary electron multiplicity. The lifetime of hypernuclei in the region of uranium is found to be (1.25[plus minus]0.15)[times]10[sup [minus]10] sec. It is observed that [Lambda] hyperons predominantly stick to the heavier fission fragments. The yield of hypernuclei is found to be (7.4[plus minus]1.7)[times]10[sup [minus]3] per stopped antiproton. No coincidences with [ital K][sup +] were found. Statistical and systematic errors on the number of events expected do not rule out this possibility.

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