FISSION OF HEAVY HYPERNUCLEI FORMED IN ANTIPROTON ANNIHILATION

被引：74

作者：

ARMSTRONG, TA

BOCQUET, JP

ERICSSON, G

JOHANSSON, T

KROGULSKI, T

LEWIS, RA

MALEK, F

MAUREL, M

MONNAND, E

MOUGEY, J

NIFENECKER, H

PASSANEAU, J

PERRIN, P

POLIKANOV, SM

REYCAMPAGNOLLE, M

RISTORI, C

SMITH, GA

TIBELL, G

机构：

[1] UNIV UPPSALA, DEPT RADIAT SCI, S-75121 UPPSALA, SWEDEN

[2] WARSAW UNIV, BIALYSTOK BRANCH, PL-15424 BIALYSTOK, POLAND

[3] CEN, DRFMC, F-38041 GRENOBLE, FRANCE

[4] CONTINUOUS ELECTRON BEAM ACCELERATOR FACIL, NEWPORT NEWS, VA 23606 USA

[5] GESELL SCHWERIONENFORSCH MBH, W-6100 DARMSTADT, GERMANY

[6] INST NATL PHYS NUCL & PHYS PARTICULES, CTR SPECT NUCL & SPECT MASSE, CNRS, F-91405 ORSAY, FRANCE

[7] INST NATL PHYS NUCL & PHYS PARTICULES, INST SCI NUCL, CNRS, ORSAY, FRANCE

[8] UNIV GRENOBLE, GRENOBLE, FRANCE

来源：

PHYSICAL REVIEW C | 1993年 / 47卷 / 05期

关键词：

D O I：

10.1103/PhysRevC.47.1957

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Heavy hypernuclei are produced in the annihilation of antiprotons in U-238. 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 +/- 0.15) x 10(-10) sec. It is observed that A hyperons predominantly stick to the heavier fission fragments. The yield of hypernuclei is found to be (7.4 +/- 1.7) X 10(-3) per stopped antiproton. No coincidences with K+ were found. Statistical and systematic errors on the number of events expected do not rule out this possibility.

引用

页码：1957 / 1969

页数：13

共 19 条

[1] THE LEAR PS177 LOW-ENERGY K+ DETECTOR [J].

ARMSTRONG, TA ;

ELIAS, DM ;

LEWIS, RA ;

MINOR, ED ;

PASSANEAU, J ;

SMITH, GA .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1990, 289 (1-2) :109-114

[2]

BJORNHOLM S, 1980, REV MOD PHYS, V7, P52

[3]

BJORNHOLM S, 1980, REV MOD PHYS, V7, P25

[4] DELAYED FISSION FROM THE ANTIPROTON ANNIHILATION IN BI-209 - EVIDENCE FOR HYPERNUCLEAR DECAY [J].

BOCQUET, JP ;

EPHERREREYCAMPAGNOLLE, M ;

ERICSSON, G ;

JOHANSSON, T ;

KONIJN, J ;

KROGULSKI, T ;

MAUREL, M ;

MONNAND, E ;

MOUGEY, J ;

NIFENECKER, H ;

PERRIN, P ;

POLIKANOV, S ;

RISTORI, C ;

TIBELL, G .

PHYSICS LETTERS B, 1987, 192 (3-4) :312-314

[5] OBSERVATION OF THE DELAYED FISSION INDUCED BY ANTIPROTON ANNIHILATION IN U-238 [J].

BOCQUET, JP ;

CAMPAGNOLLE, MER ;

ERICSSON, G ;

JOHANSSON, T ;

KONIJN, J ;

KROGULSKI, T ;

MAUREL, M ;

MONNAND, E ;

MOUGEY, J ;

NIFENECKER, H ;

PERRIN, P ;

POLIKANOV, S ;

RISTORI, C ;

TIBELL, G .

PHYSICS LETTERS B, 1986, 182 (02) :146-150

[6]

BOCQUET JP, 1992, PHYS REV C, V45, P2332

[7] HEAVY-ION INDUCED SECONDARY-ELECTRON EMISSION - POSSIBLE METHOD FOR Z-IDENTIFICATION [J].

CLERC, HG ;

GEHRHARD.HJ ;

RICHTER, L ;

SCHMIDT, KH .

NUCLEAR INSTRUMENTS & METHODS, 1973, 113 (03) :325-331

[8] LAMBDA-O PRODUCTION FROM LOW-ENERGY ANTIPROTON ANNIHILATIONS IN COMPLEX NUCLEI [J].

CONDO, GT ;

HANDLER, T ;

COHN, HO .

PHYSICAL REVIEW C, 1984, 29 (04) :1531-1533

[9] A STUDY OF TRAPPING OF LAMBDA0 HYPERONS PRODUCED BY K- MESON ABSORPTION IN A HEAVY LIQUID BUBBLE CHAMBER [J].

CSEJTHEYBARTH, M ;

SCHOROCHOFF, G ;

VANBINST, P .

NUCLEAR PHYSICS B, 1969, B 14 (02) :330-+

[10] ANTIPROTON-NUCLEUS INTERACTION [J].

CUGNON, J ;

VANDERMEULEN, J .

ANNALES DE PHYSIQUE, 1989, 14 (01) :49-88

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