Using γ rays to disentangle fusion-fission and quasifission near the Coulomb barrier: A test of principle in the fusion-fission and quasielastic channels

被引：6

作者：

Vardaci, E. ^{[1
,2
]}

Pulcini, A. ^{[1
,2
]}

Kozulin, E. M. ^{[3
]}

Matea, I ^{[4
]}

Verney, D. ^{[4
]}

Maj, A. ^{[5
]}

Schmitt, C. ^{[6
]}

Itkis, I. M. ^{[3
]}

Knyazheva, G. N. ^{[3
]}

Novikov, K. ^{[3
]}

Kozulina, N. ^{[3
]}

Harca, I. M. ^{[3
]}

Kolesov, I., V ^{[3
]}

Saveleva, K. ^{[3
]}

Kirakosyan, V. V. ^{[3
]}

Dorvaux, O. ^{[7
]}

Ciemala, M. ^{[5
]}

Brambilla, S. ^{[8
]}

Ashaduzzaman, M. ^{[1
,2
,9
]}

De Canditiis, B. ^{[1
,2
]}

Di Nitto, A. ^{[1
,2
]}

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

Parascandolo, C. ^{[2
]}

Pierroutsakou, D. ^{[2
]}

Rath, P. K. ^{[1
,2
,10
]}

Sposito, G. ^{[1
,2
]}

La Rana, G. ^{[1
,2
]}

Bracco, A. ^{[8
,11
]}

Camera, F. ^{[8
,11
]}

Stezowski, O. ^{[8
,11
]}

Borcea, C. ^{[12
]}

Calinescu, S. ^{[12
]}

Petrone, C. ^{[12
]}

Wilson, J. ^{[4
]}

机构：

[1] Univ Napoli Federico II, Dipartimento Fis E Pancini, I-80126 Naples, Italy

[2] Ist Nazl Fis Nucl, Sez Napoli, I-80126 Naples, Italy

[3] Joint Inst Nucl Res, Flerov Lab Nucl React, Dubna 141980, Moscow Region, Russia

[4] Univ Paris Saclay, CNRS IN2P3, IPN, F-91405 Orsay, France

[5] Inst Nucl Phys PAN, Krakow, Poland

[6] IPHC, F-67037 Strasbourg, France

[7] Univ Strasbourg, CNRS IN2P3, IPHC, F-67037 Strasbourg, France

[8] Ist Nazl Fis Nucl, Sez Milano, Milan, Italy

[9] Green Univ Bangladesh, Dept Elect & Elect Engn, Dhaka, Bangladesh

[10] Centurion Univ, Paralakhemundi 761211, Odisha, India

[11] Univ Milan, Milan, Italy

[12] Horia Hulubei Natl Inst Res & Dev Phys & Nucl Eng, Bucharest, Magurele, Romania

来源：

PHYSICAL REVIEW C | 2020年 / 101卷 / 06期

关键词：

ANGULAR-MOMENTUM; HEAVY; DYNAMICS; NUCLEI; SYSTEMATICS; DISCOVERY; PRODUCTS;

D O I：

10.1103/PhysRevC.101.064612

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 overlap in the mass symmetric region of the reaction products from fusion-fission and quasifission complicates the assignment of symmetric events to complete fusion on the basis of the mass distribution alone. Additional observables, besides mass distribution, should be used. The approach proposed here relies on the fact that fusion-fission and quasifission are characterized by different timescales. Within this framework, we performed a detailed study to find out how timescales can be probed via angular momentum transfer as measured via gamma-ray multiplicities. The proof of principle was carried out by measuring the gamma rays in coincidence with fusion-fission and quasielastic binary fragments in the reaction S-32 + Au-197 at beam energy near the Coulomb barrier. The experiment was performed at the Accelerateur Lineaire Tandem a Orsay (ALTO) facility at the Institut De Physique Nucleaire (IPN) in Orsay (France) using a detection setup consisting of ORGAM (ORsay GAMma) and PARIS (Photon Array Radioactive Ion Stable beams) gamma-detectors arrays coupled with the CORSET (CORrelation SETup) time-of-flight spectrometer. Results of the sensitivity of this method to distinguish reaction channels with different dynamics are discussed.

引用

页数：13

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