Abstract.
The present paper focuses on several particular aspects related to the even-odd effects in prompt emission in fission synthesized as follows: 1) The even-odd effects in prompt emission are the result of two contributions, a dominant one due to the even-odd nuclear character of fission fragments reflected in their properties and consequently in the emitted prompt neutrons and gammas, and a weaker contribution brought by the even-odd effect in the fragment distribution (over which the prompt emission matrices are averaged). Oscillations with a periodicity of about 5 mass units are present in different prompt emission quantities corresponding to even-Z and odd-Z fragmentations independent of the size of the even-odd effect in the charge yield Y(Z) . 2) The oscillation periodicity \(\Delta A\approx 5\) in the charge polarization \(\Delta Z(A)\) and rms(A) of the isobaric charge distribution as well as in the fragment mass yields Y(A) of even-Z and odd-Z fragmentations is also due to the periodicity of nuclear properties being independent of the size of the even-odd effect in Y(Z) . Only the magnitude of the oscillation amplitudes of \(\Delta Z(A)\) , rms(A) and Y(A) of even-Z and odd-Z fragmentations reflects in different ways the size of the even-odd effect in Y(Z) . 3) Not only the basic features of the global even-odd effect in fragment yields and prompt emission are the same but also the local even-odd effect in prompt emission --reported for the first time in this paper-- exhibits the same behaviour as the experimental data of the local even-odd effect in Y(Z) . 4) A correlation between the even-odd effect in Y(Z) and prompt emission quantities (e.g., \(\nu(Z)\) exists. This interrelation is through the nuclear properties of the fission fragments. The presence of oscillations with a period \(\Delta A\approx 5\) in both Y(A) and prompt emission quantities corresponding to even-Z and odd-Z fragmentations cannot be directly linked to the size of the even-odd effect in Y(Z) .
References
A. Tudora, F.-J. Hambsch, G. Giubega, I. Visan, Nucl. Phys. A 929, 260 (2014)
A. Tudora, F.-J. Hambsch, G. Giubega, I. Visan, Nucl. Phys. A 933, 165 (2015)
A. Tudora, F.-J. Hambsch, G. Giubega, I. Visan, Phys. Proc. 64, 62 (2015)
A. Tudora, F.-J. Hambsch, G. Giubega, I. Visan, EPJ Web of Conferences 111, 05002 (2016)
C. Wagemans (Editor), The Nuclear Fission Process (CRC Press Boca Raton, NY, USA, 1991) Chapt. 8
A.C. Wahl, At. Data Nucl. Data Tables 39, 1 (1988)
A.C. Wahl, in Compilation and evaluation of fission yield nuclear data, Final report of CRP 1991-1996, IAEA TECDOC-1168 (2000) sects. 4.1, 4.2, 7.4
A.C. Wahl, in Fission Product Yield Data for the Transmutation of Minor Actinide Nuclear Waste, IAEA STI/PUB/1286 (2008) Chapt. 4.2
A. Tudora, F.-J. Hambsch, G. Giubega, Roum. Rep. Phys. 68 (2) (2016) in press. Available online at http://www.rrp.infim.ro/inpress.html
R. Capote, Chen Y.-J., F.-J. Hambsch, N.V. Kornilov, J.P. Lestone, O. Litaize, B. Morillon, D. Neudecker, S. Oberstedt, T. Ohsawa, N. Otuka, V.G. Pronyaev, A. Saxena, O. Serot, O.A. Shcherbakov, Shu N.-C., D.L. Smith, P. Talou, A. Trkov, A.C. Tudora, R. Vogt, S. Vorobyev, Nucl. Data Sheets 131, 1 (2016)
A. Al-Adili, F.-J. Hambsch, S. Oberstedt, S. Pomp, Phys. Proc. 31, 158 (2012)
A. Al-Adili, Measurement of the ${}^{234}U(n,f)$ reaction with a Frish-grid ionisation chamber up to $En=5$ MeV, PhD Thesis, UPPSALA University (2013). Available online at: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-185306
A. Al-Adili, F.-J. Hambsch, S. Pomp, S. Oberstedt, M. Vidali, Phys. Rev. C 93, 034603 (2016)
F.-J. Hambsch, S. Oberstedt, Nucl. Phys. A 617, 347 (1997)
F.-J. Hambsch, H.H. Knitter, C. Budtz-Jorgensen, Nucl. Phys. A 554, 209 (1993)
Ch. Straede, C. Budtz-Jorgensen, H.H. Knitter, Nucl. Phys. A 462, 85 (1987)
N. Caamano, F. Rejmund, K.-H. Schmidt, J. Phys. G: Nucl. Part. Phys. 38, 035101 (2011)
Author information
Authors and Affiliations
Corresponding author
Additional information
Communicated by F. Gulminelli
Rights and permissions
About this article
Cite this article
Tudora, A., Hambsch, F.J. & Giubega, G. Particular aspects related to the even-odd effects in prompt emission. Eur. Phys. J. A 52, 182 (2016). https://doi.org/10.1140/epja/i2016-16182-2
Received:
Revised:
Accepted:
Published:
DOI: https://doi.org/10.1140/epja/i2016-16182-2