### Abstract

Competition among particle evaporation, temperature gradient, and flow is investigated in a phenomenological manner, based on a simultaneous analysis of quantum statistical correlations and momentum distributions for a nonrelativistic, spherically symmetric, three-dimensionally expanding, finite source. The parameters of the model emission function are constrained by fits to neutron and proton momentum distributions and correlation functions in intermediate-energy heavy-ion collisions. The temperature gradient is related to the momentum dependence of the radius parameters of the two-particle correlation function, as well as to the momentum-dependent temperature parameter of the single particle spectrum, while a long duration of particle evaporation is found to be responsible for the low relative momentum behavior of the two-particle correlations.

Original language | English |
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Pages (from-to) | 2626-2635 |

Number of pages | 10 |

Journal | Physical Review C - Nuclear Physics |

Volume | 56 |

Issue number | 5 |

Publication status | Published - Nov 1997 |

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### ASJC Scopus subject areas

- Physics and Astronomy(all)
- Nuclear and High Energy Physics

### Cite this

*Physical Review C - Nuclear Physics*,

*56*(5), 2626-2635.

**Quantum statistical correlations and single-particle distributions for slowly expanding systems with temperature profile.** / Helgesson, J.; Csörgő, T.; Asakawa, M.; Lörstad, B.

Research output: Contribution to journal › Article

*Physical Review C - Nuclear Physics*, vol. 56, no. 5, pp. 2626-2635.

}

TY - JOUR

T1 - Quantum statistical correlations and single-particle distributions for slowly expanding systems with temperature profile

AU - Helgesson, J.

AU - Csörgő, T.

AU - Asakawa, M.

AU - Lörstad, B.

PY - 1997/11

Y1 - 1997/11

N2 - Competition among particle evaporation, temperature gradient, and flow is investigated in a phenomenological manner, based on a simultaneous analysis of quantum statistical correlations and momentum distributions for a nonrelativistic, spherically symmetric, three-dimensionally expanding, finite source. The parameters of the model emission function are constrained by fits to neutron and proton momentum distributions and correlation functions in intermediate-energy heavy-ion collisions. The temperature gradient is related to the momentum dependence of the radius parameters of the two-particle correlation function, as well as to the momentum-dependent temperature parameter of the single particle spectrum, while a long duration of particle evaporation is found to be responsible for the low relative momentum behavior of the two-particle correlations.

AB - Competition among particle evaporation, temperature gradient, and flow is investigated in a phenomenological manner, based on a simultaneous analysis of quantum statistical correlations and momentum distributions for a nonrelativistic, spherically symmetric, three-dimensionally expanding, finite source. The parameters of the model emission function are constrained by fits to neutron and proton momentum distributions and correlation functions in intermediate-energy heavy-ion collisions. The temperature gradient is related to the momentum dependence of the radius parameters of the two-particle correlation function, as well as to the momentum-dependent temperature parameter of the single particle spectrum, while a long duration of particle evaporation is found to be responsible for the low relative momentum behavior of the two-particle correlations.

UR - http://www.scopus.com/inward/record.url?scp=0040601109&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0040601109&partnerID=8YFLogxK

M3 - Article

VL - 56

SP - 2626

EP - 2635

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

IS - 5

ER -