Towards the Limits of Existence of Nuclear Structure: Observation and First Spectroscopy of the Isotope 31K by Measuring Its Three-Proton Decay

被引：17

作者：

Kostyleva, D. ^{[1
,2
]}

Mukha, I ^{[1
]}

Acosta, L. ^{[3
,4
]}

Casarejos, E. ^{[5
]}

Chudoba, V ^{[6
,7
]}

Ciemny, A. A. ^{[8
]}

Dominik, W. ^{[8
]}

Duenas, J. A. ^{[9
,10
]}

Dunin, V ^{[11
]}

Espino, J. M. ^{[12
]}

Estrade, A. ^{[13
]}

Farinon, F. ^{[1
]}

Fomichev, A. ^{[6
]}

Geissel, H. ^{[1
,2
]}

Gorshkov, A. ^{[6
]}

Grigorenko, L., V ^{[6
,14
,15
]}

Janas, Z. ^{[8
]}

Kaminski, G. ^{[6
,16
]}

Kiselev, O. ^{[1
]}

Knobel, R. ^{[1
,2
]}

Krupko, S. ^{[6
]}

Kuich, M. ^{[8
,17
]}

Litvinov, Yu A. ^{[1
]}

Marquinez-Duran, G. ^{[18
]}

Martel, I ^{[19
]}

Mazzocchi, C. ^{[8
]}

Nociforo, C. ^{[1
]}

Orduz, A. K. ^{[26
]}

Pfutzner, M. ^{[1
,8
]}

Pietri, S. ^{[1
]}

Pomorski, M. ^{[8
]}

Prochazka, A. ^{[1
]}

Rymzhanova, S. ^{[6
]}

Sanchez-Benitez, A. M. ^{[20
]}

Scheidenberger, C. ^{[1
,2
]}

Simon, H. ^{[1
]}

Sitar, B. ^{[21
]}

Slepnev, R. ^{[6
]}

Stanoiu, M. ^{[22
]}

Strmen, P. ^{[21
]}

Szarka, I ^{[21
]}

Takechi, M. ^{[1
]}

Tanaka, Y. K. ^{[1
,23
]}

Weick, H. ^{[1
]}

Winkler, M. ^{[1
]}

Winfield, J. S. ^{[1
]}

Xu, X. ^{[1
,2
,24
]}

Zhukov, M., V ^{[25
]}

机构：

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

[2] Justus Liebig Univ, Phys Inst 2, D-35392 Giessen, Germany

[3] INFN, Lab Nazl Sud, Via S Sofia, I-95123 Catania, Italy

[4] Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico

[5] Univ Vigo, Vigo 36310, Spain

[6] JINR, Flerov Lab Nucl React, Dubna 141980, Russia

[7] Silesian Univ Opava, Inst Phys, Opava 74601, Czech Republic

[8] Univ Warsaw, Fac Phys, PL-02093 Warsaw, Poland

[9] Univ Huelva, Dept Ingn Elect, Huelva 21071, Spain

[10] Univ Huelva, Ctr Estudios Avanzados Fis Matemat & Computat, Huelva 21071, Spain

[11] JINR, Veksler & Baldin Lab High Energy Phys, Dubna 141980, Russia

[12] Univ Seville, Dept Atom Mol & Nucl Phys, E-41012 Seville, Spain

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

[14] Natl Res Nucl Univ MEPhI, Moscow 115409, Russia

[15] Kurchatov Inst, Natl Res Ctr, Kurchatov Sq 1, Moscow 123182, Russia

[16] Univ Warsaw, Heavy Ion Lab, PL-02093 Warsaw, Poland

[17] Warsaw Univ Technol, Fac Phys, PL-00662 Warsaw, Poland

[18] Univ Huelva, Dept Appl Phys, Huelva 21071, Spain

[19] Univ Liverpool, Dept Phys, Liverpool L69 9ZE, Merseyside, England

[20] Univ Huelva, Dept Integrated Sci, CEAFMC, Huelva 21071, Spain

[21] Comenius Univ, Fac Math & Phys, Bratislava 84248, Slovakia

[22] IFIN HH, POB MG 6, Bucharest 077125, Romania

[23] Univ Tokyo, Tokyo 1130033, Japan

[24] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China

[25] Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden

[26] GANIL, Bd Henri Becquerel, F-14076 Caen, France

来源：

PHYSICAL REVIEW LETTERS | 2019年 / 123卷 / 09期

基金：

俄罗斯科学基金会;

关键词：

Decay; (organic);

D O I：

10.1103/PhysRevLett.123.092502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The most remote isotope from the proton dripline (by 4 atomic mass units) has been observed: K-31. It is unbound with respect to three-proton (3p) emission, and its decays have been detected in flight by measuring the trajectories of all decay products using microstrip detectors. The 3p emission processes have been studied by the means of angular correlations of S-28 + 3p and the respective decay vertices. The energies of the previously unknown ground and excited states of K-31 have been determined. This provides its 3p separation energy value S-3p of -4.6(2) MeV. Upper half-life limits of 10 ps of the observed K-31 states have been derived from distributions of the measured decay vertices.

引用

页数：5

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