Production of neutron-rich isotopes by cold fragmentation in the reaction 197Au+Be at 950 A MeV

被引：111

作者：

Benlliure, J ^{[1
]}

Schmidt, KH

Cortina-Gil, D

Enqvist, T

Farget, F

Heinz, A

Junghans, AR

Pereira, J

Taieb, J

机构：

[1] Univ Santiago Compostela, Santiago De Compostela 15706, Spain

[2] Gesell Schwerionenforsch, D-64291 Darmstadt, Germany

[3] Inst Phys Nucl, F-91406 Orsay, France

来源：

NUCLEAR PHYSICS A | 1999年 / 660卷 / 01期

关键词：

relativistic heavy-ion collisions; fragmentation reactions; production of neutron-rich isotopes; model description;

D O I：

10.1016/S0375-9474(99)00386-3

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：

The production cross sections and longitudinal-momentum distributions of very neutron-rich isotopes have been investigated in the fragmentation of a 950 A MeV Au-179 beam in a beryllium target. Seven new isotopes (Re-193, Re-194, W-191, W-192, Tl-189, Hf-187 and Hf-188) and the five-proton-removal channel were observed for the first time. The reaction mechanism leading to the formation of these very neutron-rich isotopes is explained in terms of the cold-fragmentation process. An analytical model describing this reaction mechanism is presented. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：87 / 100

页数：14

共 29 条

[1] SINGLE NUCLEON REMOVAL IN RELATIVISTIC NUCLEAR COLLISIONS [J].

BENESH, CJ ;

COOK, BC ;

VARY, JP .

PHYSICAL REVIEW C, 1989, 40 (03) :1198-1206

[2]

BENLLIURE J, UNPUB NUCL INSTR M A

[3] PROJECTILE FISSION AT RELATIVISTIC VELOCITIES - A NOVEL AND POWERFUL SOURCE OF NEUTRON-RICH ISOTOPES WELL SUITED FOR IN-FLIGHT ISOTOPIC-SEPARATION [J].

BERNAS, M ;

CZAJKOWSKI, S ;

ARMBRUSTER, P ;

GEISSEL, H ;

DESSAGNE, P ;

DONZAUD, C ;

FAUST, HR ;

HANELT, E ;

HEINZ, A ;

HESSE, M ;

KOZHUHAROV, C ;

MIEHE, C ;

MUNZENBERG, G ;

PFUTZNER, M ;

ROHL, C ;

SCHMIDT, KH ;

SCHWAB, W ;

STEPHAN, C ;

SUMMERER, K ;

TASSANGOT, L ;

VOSS, B .

PHYSICS LETTERS B, 1994, 331 (1-2) :19-24

[4]

Brohm T., 1994, THESIS TH DARMSTADT

[5] SIZE AND EXCITATION-ENERGY DISTRIBUTIONS OF PROJECTILE SPECTATORS IN MULTIFRAGMENTATION DATA [J].

CAMPI, X ;

KRIVINE, H ;

PLAGNOL, E .

PHYSICAL REVIEW C, 1994, 50 (06) :R2680-R2683

[6] Fragmentation cross sections of relativistic 208Pb projectiles [J].

de Jong, M ;

Schmidt, KH ;

Blank, B ;

Bockstiegel, C ;

Brohm, T ;

Clerc, HG ;

Czajkowski, S ;

Dornik, M ;

Geissel, H ;

Grewe, A ;

Hanelt, E ;

Heinz, A ;

Irnich, H ;

Junghans, AR ;

Magel, A ;

Munzenberg, G ;

Nickel, F ;

Pfutzner, M ;

Piechaczek, A ;

Scheidenberger, C ;

Schwabb, W ;

Steinhauser, S ;

Summerer, K ;

Trinder, W ;

Voss, B ;

Ziegler, C .

NUCLEAR PHYSICS A, 1998, 628 (03) :479-492

[7] INTERACTION OF HEAVY PRIMARY COSMIC RAYS IN LEAD [J].

EISENBERG, Y .

PHYSICAL REVIEW, 1954, 96 (05) :1378-1382

[8] ISOBAR EXCITATIONS IN NUCLEI [J].

GAARDE, C .

ANNUAL REVIEW OF NUCLEAR AND PARTICLE SCIENCE, 1991, 41 :187-218

[9] A REEXAMINATION OF THE ABRASION-ABLATION MODEL FOR THE DESCRIPTION OF THE NUCLEAR FRAGMENTATION REACTION [J].

GAIMARD, JJ ;

SCHMIDT, KH .

NUCLEAR PHYSICS A, 1991, 531 (3-4) :709-745

[10] THE GSI PROJECTILE FRAGMENT SEPARATOR (FRS) - A VERSATILE MAGNETIC SYSTEM FOR RELATIVISTIC HEAVY-IONS [J].

GEISSEL, H ;

ARMBRUSTER, P ;

BEHR, KH ;

BRUNLE, A ;

BURKARD, K ;

CHEN, M ;

FOLGER, H ;

FRANCZAK, B ;

KELLER, H ;

KLEPPER, O ;

LANGENBECK, B ;

NICKEL, F ;

PFENG, E ;

PFUTZNER, M ;

ROECKL, E ;

RYKACZEWSKI, K ;

SCHALL, I ;

SCHARDT, D ;

SCHEIDENBERGER, C ;

SCHMIDT, KH ;

SCHROTER, A ;

SCHWAB, T ;

SUMMERER, K ;

WEBER, M ;

MUNZENBERG, G ;

BROHM, T ;

CLERC, HG ;

FAUERBACH, M ;

GAIMARD, JJ ;

GREWE, A ;

HANELT, E ;

KNODLER, B ;

STEINER, M ;

VOSS, B ;

WECKENMANN, J ;

ZIEGLER, C ;

MAGEL, A ;

WOLLNIK, H ;

DUFOUR, JP ;

FUJITA, Y ;

VIEIRA, DJ ;

SHERRILL, B .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1992, 70 (1-4) :286-297

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