Observation and Spectroscopy of New Proton-Unbound Isotopes 30Ar and 29Cl: An Interplay of Prompt Two-Proton and Sequential Decay

被引：44

作者：

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

Grigorenko, L. V. ^{[2
,3
,4
]}

Xu, X. ^{[1
,5
,6
]}

Acosta, L. ^{[7
,8
]}

Casarejos, E. ^{[9
]}

Ciemny, A. A. ^{[10
]}

Dominik, W. ^{[10
]}

Duenas-Diaz, J. ^{[11
]}

Dunin, V. ^{[12
]}

Espino, J. M. ^{[13
]}

Estrade, A. ^{[14
]}

Farinon, F. ^{[1
]}

Fomichev, A. ^{[3
]}

Geissel, H. ^{[1
,5
]}

Golubkova, T. A. ^{[15
]}

Gorshkov, A. ^{[3
]}

Janas, Z. ^{[10
]}

Kaminski, G. ^{[3
,16
]}

Kiselev, O. ^{[1
]}

Knoebel, R. ^{[1
,5
]}

Krupko, S. ^{[3
]}

Kuich, M. ^{[10
,17
]}

Litvinov, Yu A. ^{[1
]}

Marquinez-Duran, G. ^{[11
]}

Martel, I. ^{[11
]}

Mazzocchi, C. ^{[10
]}

Nociforo, C. ^{[1
]}

Orduz, A. K. ^{[11
]}

Pfuetzner, M. ^{[1
,10
]}

Pietri, S. ^{[1
]}

Pomorski, M. ^{[10
]}

Prochazka, A. ^{[1
]}

Rymzhanova, S. ^{[3
]}

Sanchez-Benitez, A. M. ^{[11
]}

Scheidenberger, C. ^{[1
,5
]}

Sharov, P. ^{[3
]}

Simon, H. ^{[1
]}

Sitar, B. ^{[18
]}

Slepnev, R. ^{[3
]}

Stanoiu, M. ^{[19
]}

Strmen, P. ^{[18
]}

Szarka, I. ^{[18
]}

Takechi, M. ^{[1
]}

Tanaka, Y. K. ^{[1
,20
]}

Weick, H. ^{[1
]}

Winkler, M. ^{[1
]}

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

Zhukov, M. V. ^{[21
]}

机构：

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

[2] Kurchatov Inst, Natl Res Ctr, Moscow 123182, Russia

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

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

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

[6] Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China

[7] Ist Nazl Fis Nucl, Lab Nazl Sud, I-95123 Catania, Italy

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

[9] Univ Vigo, Vigo 36310, Spain

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

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

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

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

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

[15] Moscow MV Lomonosov State Univ, Adv Educ & Sci Ctr, Moscow 121357, Russia

[16] Inst Nucl Phys PAN, PL-31342 Krakow, Poland

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

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

[19] IFIN HH, Bucharest, Romania

[20] Univ Tokyo, Tokyo 1130033, Japan

[21] Chalmers, Fundamental Phys, S-41296 Gothenburg, Sweden

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 115卷 / 20期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1103/PhysRevLett.115.202501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Previously unknown isotopes Ar-30 and Cl-29 have been identified by measurement of the trajectories of their in-flight decay products S-28 + p + p and S-28 + p, respectively. The analysis of angular correlations of the fragments provided information on decay energies and the structure of the parent states. The ground states of Ar-30 and Cl-29 were found at 2.25(-0.10)(+0.15) and 1.8 +/- 0.1 MeV above the two-and one-proton thresholds, respectively. The lowest states in Ar-30 and Cl-29 point to a violation of isobaric symmetry in the structure of these unbound nuclei. The two-proton decay has been identified in a transition region between simultaneous two-proton and sequential proton emissions from the Ar-30 ground state, which is characterized by an interplay of three-body and two-body decay mechanisms. The first hint of a fine structure of the two-proton decay of Ar-30*(2(+)) has been obtained by detecting two decay branches into the ground and first-excited states of the S-28 fragment.

引用

页数：7

共 4 条

[1] Spectroscopy of excited states of unbound nuclei 30Ar and 29Cl
Xu, X-D.
Mukha, I.
Grigorenko, L. V.
Scheidenberger, C.
Acosta, L.
Casarejos, E.
Chudoba, V.
Ciemny, A. A.
Dominik, W.
Duenas-Diaz, J.
Dunin, V.
Espino, J. M.
Estrade, A.
Farinon, F.
Fomichev, A.
Geissel, H.
Golubkova, T. A.
Gorshkov, A.
Janas, Z.
Kaminski, G.
Kiselev, O.
Knobel, R.
Krupko, S.
Kuich, M.
Litvinov, Yu. A.
Marquinez-Duran, G.
Martel, I.
Mazzocchi, C.
Nociforo, C.
Orduz, A. K.
Pfuetzner, M.
Pietri, S.
Pomorski, M.
Prochazka, A.
Rymzhanova, S.
Sanchez-Benitez, A. M.
Sharov, P.
Simon, H.
Sitar, B.
Slepnev, R.
Stanoiu, M.
Strmen, P.
Szarka, I.
Takechi, M.
Tanaka, Y. K.
Weick, H.
Winkler, M.
Winfield, J. S.
PHYSICAL REVIEW C, 2018, 97 (03)
[2] Interplay between sequential and prompt two-proton decay from the first excited state of 16Ne
Brown, K. W.
Charity, R. J.
Sobotka, L. G.
Grigorenko, L. V.
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PHYSICAL REVIEW C, 2015, 92 (03):
[3] Spectroscopy of proton-unbound nuclei by tracking their decay products in-flight: One- and two-proton decays of 15F, 16Ne, and 19Na
Mukha, I.
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PHYSICAL REVIEW C, 2010, 82 (05):
[4] Prospective candidates for the two-proton decay studies.: (II) Exploratory studies of 30Ar, 34Ca, and 45Fe
Grigorenko, LV
Mukha, IG
Zhukov, MV
NUCLEAR PHYSICS A, 2003, 714 (3-4) : 425 - 440

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