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AbstractAbstract
[en] Heavy and light fragments in fission usually share a common angular distribution, associated with a defined parity for an isolated saddle-point state. In 230Th(n,f) at 708 keV, the triple-humped fission barrier model suggests an overlap of two saddle-point states of opposite parity based on the same asymmetric configuration. The model then predicts fore-and-aft asymmetry for, say, the distribution of heavy fragments at a given neutron energy. For neutrons polarized perpendicular to the beam there is asymmetry in the third perpendicular direction. Experimental verification may depend critically on energy resolution. At lower energies the effect may be more general in fissionable nuclei and there is a possibility of detecting and identifying p-wave resonances at much lower energies. (Auth.)
Primary Subject
Source
Boeckhoff, K.H. (ed.) (Commission of the European Communities, Geel (Belgium). Central Bureau for Nuclear Measurements); 1072 p; ISBN 90-277-1560-2; 
; 1983; p. 751-752; D. Reidel; Dordrecht (Netherlands); International conference on nuclear data for science and technology; Antwerp (Belgium); 6-10 Sep 1982
; 1983; p. 751-752; D. Reidel; Dordrecht (Netherlands); International conference on nuclear data for science and technology; Antwerp (Belgium); 6-10 Sep 1982
Record Type
Book
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AbstractAbstract
No abstract available
Original Title
Grundlagen fuer die Gewinnung von Uran-232
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Secondary Subject
Source
1972; 4 p; Available from the library of the TU Darmstadt.; Diss. (D.Eng.).
Record Type
Report
Literature Type
Thesis/Dissertation
Country of publication
ACTINIDE NUCLEI, ALPHA DECAY RADIOISOTOPES, BARYON REACTIONS, BASIC INTERACTIONS, DECAY, EVEN-EVEN NUCLEI, HADRON REACTIONS, HEAVY NUCLEI, INTERACTIONS, ISOTOPES, LEPTONIC DECAY, NUCLEAR REACTIONS, NUCLEI, NUCLEON REACTIONS, PARTICLE DECAY, RADIOISOTOPES, TARGETS, URANIUM ISOTOPES, WEAK INTERACTIONS, YEARS LIVING RADIOISOTOPES
Reference NumberReference Number
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Levon, A.I.; Grav, G.; Ajzerman, Yu.; Gertenberger, R.; Tirolf, P.; Wirs, G.F.; Shirikova, N.Yu.; Sushkov, A.V.
Abstracts. 7 Conference of high energy physics, nuclear physics and accelerators2009
Abstracts. 7 Conference of high energy physics, nuclear physics and accelerators2009
AbstractAbstract
No abstract available
Original Title
Spektroskopiya 230Th yadra v reaktsii (p, t)
Primary Subject
Source
Dovbnya, A.N. (ed.); Natsional'naya Akademiya Nauk Ukrainy, Kyiv (Ukraine); Natsional'nyj Nauchnyj Tsentr 'Khar'kovskij Fiziko-Tekhnicheskij Institut, Khar'kov (Ukraine); Institut Vysokikh Ehnergij i Yadernoj Fiziki, Khar'kov (Ukraine); 120 p; 2009; p. 49; 7. Conference of high energy physics, nuclear physics and accelerators; 7. Konferentsiya po fizike vysokikh ehnergij, yadernoj fizike i uskoritelyam; Khar'kov (Ukraine); 23-27 Feb 2009; Available from Ukrainian INIS Centre
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Miscellaneous
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AbstractAbstract
No abstract available
Original Title
Raznoglasiya v velichinakh defektov mass yader toriya i urana i yader vol'frama, poluchennykh iz (p, t) reaktsij
Primary Subject
Source
Dovbnya, A.N. (ed.); Natsional'naya Akademiya Nauk Ukrainy, Kyiv (Ukraine); Natsional'nyj Nauchnyj Tsentr 'Khar'kovskij Fiziko-Tekhnicheskij Institut, Khar'kov (Ukraine); Institut Vysokikh Ehnergij i Yadernoj Fiziki, Khar'kov (Ukraine); 120 p; 2009; p. 50; 7. Conference of high energy physics, nuclear physics and accelerators; 7. Konferentsiya po fizike vysokikh ehnergij, yadernoj fizike i uskoritelyam; Khar'kov (Ukraine); 23-27 Feb 2009; Available from Ukrainian INIS Centre
Record Type
Miscellaneous
Literature Type
Conference
Report Number
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ACTINIDE NUCLEI, ALPHA DECAY RADIOISOTOPES, BARYON REACTIONS, CHARGED PARTICLES, CHARGED-PARTICLE REACTIONS, DEFORMATION, DIMENSIONLESS NUMBERS, EVEN-EVEN NUCLEI, HADRON REACTIONS, HEAVY ION DECAY RADIOISOTOPES, HEAVY NUCLEI, ISOTOPES, NEON 24 DECAY RADIOISOTOPES, NUCLEAR REACTIONS, NUCLEI, NUCLEON REACTIONS, RADIOISOTOPES, SPONTANEOUS FISSION RADIOISOTOPES, TARGETS, THORIUM ISOTOPES, URANIUM ISOTOPES, YEARS LIVING RADIOISOTOPES
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Walsh, R.L.; Boldeman, J.W.
10th AINSE nuclear physics conference, held from 6th-8th February 1984 at the Australian National University Canberra1984
10th AINSE nuclear physics conference, held from 6th-8th February 1984 at the Australian National University Canberra1984
AbstractAbstract
No abstract available
Primary Subject
Source
Australian Inst. of Nuclear Science and Engineering, Lucas Heights; 98 p; 1984; p. 21; 10. AINSE nuclear physics conference; Canberra (Australia); 6-8 Feb 1984; Abstract only.
Record Type
Miscellaneous
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Conference
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Reference NumberReference Number
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Blons, J.; Fabbro, B.; Hisleur, J.M.; Julien, J.; Mazur, C.; Patin, Y.; Paya, D.; Ribrag, M.
CEA Centre d'Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France)1983
CEA Centre d'Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France)1983
AbstractAbstract
[en] In this paper we present results for the 230Th (d,pf) reaction, around 5.9 MeV excitation energy, obtained with an appropriate proton-fission time coincidence and an overall energy resolution of FWHM approximately 6keV. The resulting data shows the very same fine structure previously observed for the lower l values in the corresponding 230Th (n,f) reaction, but an additional set of higher spin states, not accessible with (n,f) reaction also appears. These new results support and confirm our previous interpretation of the (n,f) data, namely that we are again observing two close-lying rotational bands with opposite parities but this for l values up till 5 (at least), a fact which can best be understood in terms of a ''triple humped potential barrier'', theoretically expected for an asymmetric, pearlike deformation of the excited compounds nucleus
Primary Subject
Source
Jan 1983; 9 p; 21. International winter meeting on nuclear physics; Bormio (Italy); 24-29 Jan 1983
Record Type
Report
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Conference
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INIS VolumeINIS Volume
INIS IssueINIS Issue
Bruneau, B.; Sicre, A.; Fraigneau, M.F.; Benfoughal, T.; Caitucoli, F.; Doan, T.P.; Leroux, B.
Bordeaux-1 Univ., 33 - Gradignan (France). Centre d'Etudes Nucleaires1980
Bordeaux-1 Univ., 33 - Gradignan (France). Centre d'Etudes Nucleaires1980
AbstractAbstract
[en] The angular distributions of fission fragments of the 230Th(n,f) reaction have been measured for neutron energies running from 0.860 MeV to 5 MeV in 27 points. Three reactions -7Li(p,n)7Be, 3H(p,n)3He and 2H(d,n)3He- provided the incident neutrons with an energy resolution varying from +- 12 keV to +- 22 keV. Fragment detection was achieved through the use of thin polycarbonates plastic foils (Makrofol). The experimental angular distributions were fitted with polynomial expansions of even powers of cos theta and normalized to 1 for theta = 900. The α2 and α4 coefficients of the fits to our data and those of other authors are tabulated. The coefficients of anisotropy W(00)/W(900) from the present work are shown along other existing data in the same energy range
[fr]
Les distributions angulaires des fragments de fission de la reaction 230Th(n,f) ont ete mesurees pour 27 energies des neutrons dans le domaine d'energie de Esub(n) = 0,860 MeV a Esub(n) = 5 MeV. Les trois reactions productrices de neutrons -7Li(p,n)7Be, 3H(p,n)3He et 2H(d,n)3He- ont ete utilisees pour couvrir ce domaine d'energie. La resolution en energie des neutrons etait comprise entre +- 12 keV et +- 22 keV. Les fragments de fission sont enregistres au moyen de detecteurs plastiques de traces. Les distributions angulaires sont lissees par une somme de puissances paires croissantes de cosinus et normalisees a 1 pour theta = 900: W(theta) = 1 + α2 cos2theta + α4 cos4theta. Les coefficients α2 et α4 sont listes ainsi que ceux des distributions angulaires mesurees par d'autres auteurs dans le domaine d'energie. La variation du rapport W(00)/W(900) est presentee et comparee avec les resultats de ces autres auteursOriginal Title
Mesure des distributions angulaires des fragments de fission dans la reaction 230Th(n,f) de 0,860 MeV a Esub(n) = 5 MeV
Primary Subject
Source
1980; 16 p
Record Type
Report
Literature Type
Numerical Data
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Reference NumberReference Number
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Leroux, B.; Barreau, G.; Sicre, A.; Benfoughal, T.; Caitucoli, F.; Doan, T.P.; James, G.D.; UKAEA Atomic Energy Research Establishment, Harwell)
Bordeaux-1 Univ., 33 - Gradignan (France). Centre d'Etudes Nucleaires1979
Bordeaux-1 Univ., 33 - Gradignan (France). Centre d'Etudes Nucleaires1979
AbstractAbstract
No abstract available
Original Title
Etudes des structures resonnantes dans les reactions 230Th(n,f) et 232Th(n,f)
Primary Subject
Source
1979; 2 p; International symposium on physics and chemistry of fission; Juelich, Germany, F.R; 14 - 18 May 1979; Published in summary form only.
Record Type
Report
Literature Type
Conference; Numerical Data
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Lang, D.W.
Ninth AINSE nuclear physics conference, 8th - 10th February 1982, University of Melbourne1982
Ninth AINSE nuclear physics conference, 8th - 10th February 1982, University of Melbourne1982
AbstractAbstract
No abstract available
Primary Subject
Secondary Subject
Source
Australian Inst. of Nuclear Science and Engineering, Lucas Heights; 82 p; 1982; p. 11; 9. AINSE nuclear physics conference; Melbourne, Australia; 8 - 10 Feb 1982; abstract only.
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Miscellaneous
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Reference NumberReference Number
INIS VolumeINIS Volume
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Levon, A.I.
Annual report-2012. Institute for Nuclear Research of National Academy of Sciences of Ukraine2013
Annual report-2012. Institute for Nuclear Research of National Academy of Sciences of Ukraine2013
AbstractAbstract
No abstract available
Primary Subject
Source
Ivanyuk, F.O. (ed.); 177 p; 2013; p. 34; Available from Ukrainian INIS Centre
Record Type
Miscellaneous
Report Number
Country of publication
ACTINIDE NUCLEI, ALPHA DECAY RADIOISOTOPES, BARYON REACTIONS, CHARGED PARTICLES, CHARGED-PARTICLE REACTIONS, DISTRIBUTION, ENERGY LEVELS, EVEN-EVEN NUCLEI, EXCITED STATES, HADRON REACTIONS, HEAVY NUCLEI, ISOTOPES, NUCLEAR REACTIONS, NUCLEI, NUCLEON REACTIONS, RADIOISOTOPES, TARGETS, THORIUM ISOTOPES, YEARS LIVING RADIOISOTOPES
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