Spectroscopy of proton-unbound nuclei by tracking their decay products in-flight: One- and two-proton decays of 15F, 16Ne, and 19Na

被引：43

作者：

Mukha, I. ^{[1
,2
,3
]}

Suemmerer, K. ^{[1
]}

Acosta, L. ^{[4
]}

Alvarez, M. A. G. ^{[5
]}

Casarejos, E. ^{[6
,7
]}

Chatillon, A. ^{[1
]}

Cortina-Gil, D. ^{[6
]}

Egorova, I. A. ^{[8
]}

Espino, J. M. ^{[5
]}

Fomichev, A.

Garcia-Ramos, J. E. ^{[4
]}

Geissel, H. ^{[1
]}

Gomez-Camacho, J. ^{[5
]}

Grigorenko, L. ^{[1
]}

Hofmann, J. ^{[1
]}

Kiselev, O. ^{[1
,9
]}

Korsheninnikov, A. ^{[3
]}

Kurz, N. ^{[1
]}

Litvinov, Yu. A. ^{[1
,10
]}

Litvinova, E. ^{[1
,11
]}

Martel, I. ^{[4
]}

Nociforo, C. ^{[1
]}

Ott, W. ^{[1
]}

Pfuetzner, M. ^{[12
]}

Rodriguez-Tajes, C. ^{[6
,13
]}

Roeckl, E. ^{[1
]}

Stanoiu, M. ^{[1
,14
]}

Timofeyuk, N. K. ^{[15
]}

Weick, H. ^{[1
]}

Woods, P. J. ^{[16
]}

机构：

[1] GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany

[2] Univ Valencia, CSIC, IFIC, E-46071 Valencia, Spain

[3] RRC Kurchatov Inst, RU-123184 Moscow, Russia

[4] Univ Huelva, Dept Appl Phys, E-21071 Huelva, Spain

[5] Univ Seville, E-41012 Seville, Spain

[6] Univ Santiago de Compostela, E-15782 Santiago De Compostela, Spain

[7] Univ Vigo, E-36310 Vigo, Spain

[8] JINR, Bogolubov Lab Theoret Phys, RU-141980 Dubna, Russia

[9] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[10] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

[11] Goethe Univ Frankfurt, Inst Theoret Phys, D-60438 Frankfurt, Germany

[12] Warsaw Univ, IEP, PL-00681 Warsaw, Poland

[13] Ctr Laseres Pulsados CLPU, E-37008 Salamanca, Spain

[14] IFIN HH, Bucharest, Romania

[15] Univ Surrey, Dept Phys, Sch Elect Phys Sci, Guildford GU2 7XH, Surrey, England

[16] Univ Edinburgh, Edinburgh EH1 1HT, Midlothian, Scotland

来源：

PHYSICAL REVIEW C | 2010年 / 82卷 / 05期

基金：

俄罗斯基础研究基金会;

关键词：

LIGHT-NUCLEI; PROSPECTIVE CANDIDATES; ENERGY-LEVELS; RADIOACTIVITY; MASS;

D O I：

10.1103/PhysRevC.82.054315

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：

A powerful method of investigating proton-unbound nuclear states by tracking their decay products in flight is discussed in detail. To verify the method, four known levels in F-15, Ne-16, and Na-19 were investigated by measuring the angular correlations between protons and the respective heavy-ion fragments stemming from the precursor decays in flight. The parent nuclei of interest were produced in nuclear reactions of one-neutron removal from Ne-17 and Mg-20 projectiles at energies of 410-450 A MeV. The trajectories of the respective decay products, O-14 + p + p and Ne-18 + p + p, were measured by applying a tracking technique with microstrip detectors. These data were used to reconstruct the angular correlations of the fragments, which provided information on energies and widths of the parent states. In addition for reproducing properties of known states, evidence for hitherto unknown excited states in F-15 and Ne-16 was found. This tracking technique has an advantage in studies of exotic nuclei beyond the proton drip line measuring the resonance energies and widths with a high precision although by using low-intensity beams and very thick targets.

引用

页数：14