### Abstract

Different empirical and semiempirical systematics have been developed to predict unmeasured fission product yields. One of these methods, originally proposed by Musgrove et al. and developed by Cook et al. , is used to describe the energy dependence of the mass distribution in neutron-induced fission of **2**3**8U utilizing published yield data. The available measured cumulative yields of fission products are collected for monoenergetic **2**3**8U(n,f) processes. The mass distributions at approximate neutron energies of 1. 5, 2. 0, 3. 0, 3. 9, 5. 2, 6. 0, 7. 0, 7. 9, 9. 0, and 14. 7 Mev are fitted by the sum of five Gaussian functions. The energy dependence of the parameters of the Gaussian functions can also be described by semiempirical formulas. The 2 sigma error of the mass yields calculated by the fitted parameters can be estimated to be approx. 10% in the peak regions and 20% in the valley region for the above neutron energies. The formulas with the given parameters can be useful in estimating unmeasured **2**3**8U fission product yields for any monoenergetic and nonmonoenergetic neutron irradiations in the range of 1. 5 to 15 Mev. The method has been tested in a study of the **2**3** 8U fission by neutrons having a Watt spectrum produced in the thermal fission of **2**3**5U.

Original language | English |
---|---|

Pages (from-to) | 154-163 |

Number of pages | 10 |

Journal | Nuclear Science and Engineering |

Volume | 88 |

Issue number | 2 |

Publication status | Published - Oct 1984 |

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### ASJC Scopus subject areas

- Nuclear Energy and Engineering

### Cite this

*Nuclear Science and Engineering*,

*88*(2), 154-163.

**SEMIEMPIRICAL DESCRIPTION OF THE MASS DISTRIBUTION FOR THE **2**3**8U(n,f) PROCESS IN THE 1. 5- TO 15-Mev ENERGY INTERVAL.** / Nagy, S.; Daroczy, S.; Raics, P.; Boda, I.; Matajsz, I.

Research output: Contribution to journal › Article

*Nuclear Science and Engineering*, vol. 88, no. 2, pp. 154-163.

}

TY - JOUR

T1 - SEMIEMPIRICAL DESCRIPTION OF THE MASS DISTRIBUTION FOR THE **2**3**8U(n,f) PROCESS IN THE 1. 5- TO 15-Mev ENERGY INTERVAL.

AU - Nagy, S.

AU - Daroczy, S.

AU - Raics, P.

AU - Boda, I.

AU - Matajsz, I.

PY - 1984/10

Y1 - 1984/10

N2 - Different empirical and semiempirical systematics have been developed to predict unmeasured fission product yields. One of these methods, originally proposed by Musgrove et al. and developed by Cook et al. , is used to describe the energy dependence of the mass distribution in neutron-induced fission of **2**3**8U utilizing published yield data. The available measured cumulative yields of fission products are collected for monoenergetic **2**3**8U(n,f) processes. The mass distributions at approximate neutron energies of 1. 5, 2. 0, 3. 0, 3. 9, 5. 2, 6. 0, 7. 0, 7. 9, 9. 0, and 14. 7 Mev are fitted by the sum of five Gaussian functions. The energy dependence of the parameters of the Gaussian functions can also be described by semiempirical formulas. The 2 sigma error of the mass yields calculated by the fitted parameters can be estimated to be approx. 10% in the peak regions and 20% in the valley region for the above neutron energies. The formulas with the given parameters can be useful in estimating unmeasured **2**3**8U fission product yields for any monoenergetic and nonmonoenergetic neutron irradiations in the range of 1. 5 to 15 Mev. The method has been tested in a study of the **2**3** 8U fission by neutrons having a Watt spectrum produced in the thermal fission of **2**3**5U.

AB - Different empirical and semiempirical systematics have been developed to predict unmeasured fission product yields. One of these methods, originally proposed by Musgrove et al. and developed by Cook et al. , is used to describe the energy dependence of the mass distribution in neutron-induced fission of **2**3**8U utilizing published yield data. The available measured cumulative yields of fission products are collected for monoenergetic **2**3**8U(n,f) processes. The mass distributions at approximate neutron energies of 1. 5, 2. 0, 3. 0, 3. 9, 5. 2, 6. 0, 7. 0, 7. 9, 9. 0, and 14. 7 Mev are fitted by the sum of five Gaussian functions. The energy dependence of the parameters of the Gaussian functions can also be described by semiempirical formulas. The 2 sigma error of the mass yields calculated by the fitted parameters can be estimated to be approx. 10% in the peak regions and 20% in the valley region for the above neutron energies. The formulas with the given parameters can be useful in estimating unmeasured **2**3**8U fission product yields for any monoenergetic and nonmonoenergetic neutron irradiations in the range of 1. 5 to 15 Mev. The method has been tested in a study of the **2**3** 8U fission by neutrons having a Watt spectrum produced in the thermal fission of **2**3**5U.

UR - http://www.scopus.com/inward/record.url?scp=0021515341&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0021515341&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0021515341

VL - 88

SP - 154

EP - 163

JO - Nuclear Science and Engineering

JF - Nuclear Science and Engineering

SN - 0029-5639

IS - 2

ER -