Impact of low-energy photons on the characteristics of prompt fission γ-ray spectra

被引：39

作者：

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

Billnert, R. ^{[1
,3
]}

Hambsch, F. -J. ^{[3
]}

Oberstedt, S. ^{[3
]}

机构：

[1] Chalmers Tekniska Hogskola, Fundamental Fys, S-41296 Gothenburg, Sweden

[2] OSSOLUT Consulting, S-70353 Orebro, Sweden

[3] Commiss European Communities, DG Joint Res Ctr IRMM, B-2440 Geel, Belgium

来源：

PHYSICAL REVIEW C | 2015年 / 92卷 / 01期

关键词：

D O I：

10.1103/PhysRevC.92.014618

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：

In this paper we report on a new study of prompt gamma-rays from the spontaneous fission of Cf-252. Photons were measured in coincidence with fission fragments by employing four different lanthanide halide scintillation detectors. Together with results from a previous work of ours, we determined characteristic parameters with high precision, such as the average gamma-ray multiplicity (nu) over bar (gamma) = (8.29 +/- 0.13), the average energy per photon is an element of(gamma) = (0.80 +/- 0.02) MeV, and the total gamma-ray energy release per fission E-gamma,(tot) = (6.65 +/- 0.10) MeV. The excellent agreement between the individual results obtained in all six measurements proves the good repeatability of the applied experimental technique. The impact of low-energy photons, i.e., below 500 keV, on prompt fission gamma-ray spectra characteristics has been investigated as well by comparing our results with those taken with the DANCE detector system, which appears to suffer from absorption effects in the low-energy region. Correction factors for this effect were estimated, giving results comparable to ours as well as to historical ones. From this we demonstrate that the different techniques of determining the average gamma-ray multiplicity, either from a properly measured and normalized spectrum or a measured multiplicity distribution, give equivalent and consistent results.

引用

页数：5

共 18 条

[1] Monte Carlo Hauser-Feshbach predictions of prompt fission γ rays: Application to nth+235U, nth+239Pu, and 252Cf(sf) [J].

Becker, B. ;

Talou, P. ;

Kawano, T. ;

Danon, Y. ;

Stetcu, I. .

PHYSICAL REVIEW C, 2013, 87 (01)

[2] New prompt spectral γ-ray data from the reaction 252Cf(sf) and its implication on present evaluated nuclear data files [J].

Billnert, R. ;

Hambsch, F. -J. ;

Oberstedt, A. ;

Oberstedt, S. .

PHYSICAL REVIEW C, 2013, 87 (02)

[3] Evidence for the stochastic aspect of prompt γ emission in spontaneous fission [J].

Chyzh, A. ;

Wu, C. Y. ;

Kwan, E. ;

Henderson, R. A. ;

Gostic, J. M. ;

Bredeweg, T. A. ;

Haight, R. C. ;

Hayes-Sterbenz, A. C. ;

Jandel, M. ;

O'Donnell, J. M. ;

Ullmann, J. L. .

PHYSICAL REVIEW C, 2012, 85 (02)

[4] A 4π BaF2 detector for (n,γ) cross-section measurements at a spallation neutron source [J].

Heil, M ;

Reifarth, R ;

Fowler, MM ;

Haight, RC ;

Käppeler, F ;

Rundberg, RS ;

Seabury, EH ;

Ullmann, JL ;

Wilhelmy, JB ;

Wisshak, K .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2001, 459 (1-2) :229-246

[5] Investigation of phenomenological models for the Monte Carlo simulation of the prompt fission neutron and γ emission [J].

Litaize, O. ;

Serot, O. .

PHYSICAL REVIEW C, 2010, 82 (05)

[6] Improved values for the characteristics of prompt-fission γ-ray spectra from the reaction 235U(nth, f) [J].

Oberstedt, A. ;

Belgya, T. ;

Billnert, R. ;

Borcea, R. ;

Brys, T. ;

Geerts, W. ;

Goeoek, A. ;

Hambsch, F. -J. ;

Kis, Z. ;

Martinez, T. ;

Oberstedt, S. ;

Szentmiklosi, L. ;

Takacs, K. ;

Vidali, M. .

PHYSICAL REVIEW C, 2013, 87 (05)

[7] Identification of prompt fission γ-rays with lanthanum-chloride scintillation detectors [J].

Oberstedt, A. ;

Oberstedt, S. ;

Billnert, R. ;

Geerts, W. ;

Hambsch, F. -J. ;

Karlsson, J. .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2012, 668 :14-20

[8] High-precision prompt-γ-ray spectral data from the reaction 241Pu(nth, f) [J].

Oberstedt, S. ;

Billnert, R. ;

Belgya, T. ;

Brys, T. ;

Geerts, W. ;

Guerrero, C. ;

Hambsch, F. -J. ;

Kis, Z. ;

Moens, A. ;

Oberstedt, A. ;

Sibbens, G. ;

Szentmiklosi, L. ;

Vanleeuw, D. ;

Vidali, M. .

PHYSICAL REVIEW C, 2014, 90 (02)

[9] Artificial diamonds as radiation-hard detectors for ultra-fast fission-fragment timing [J].

Oberstedt, S. ;

Borcea, R. ;

Brys, T. ;

Gamboni, Th. ;

Geerts, W. ;

Hambsch, F. -J. ;

Oberstedt, A. ;

Vidali, M. .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2013, 714 :31-37

[10] SPECTRUM OF PHOTONS EMITTED IN COINCIDENCE WITH FISSION OF U-235 BY THERMAL NEUTRONS [J].

PEELLE, RW ;

MAIENSCHEIN, FC .

PHYSICAL REVIEW C, 1971, 3 (01) :373-+

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