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19 April 2024 |
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Nuclear temperatures from the evaporation fragment spectra and observed anomalies | | A. Ray
; A. De
; A. Chatterjee
; S. Kailas
; S. R. Banerjee
; K. Banerjee
; S. Saha
; | | Date: |
16 Jun 2013 | | Abstract: | The extreme back-angle evaporation spectra of alpha, lithium, beryllium,
boron and carbon from different compound nuclei near A=100 (EX=76-210 MeV) have
been compared with the predictions of standard statistical model codes such as
’CASCADE’ and ’GEMINI’. It was found that the shapes of the alpha spectra agree
well with the predictions of the statistical models. However the spectra of
lithium, beryllium, boron and carbon show significantly gentler slopes implying
higher temperature of the residual nuclei, even though the spectra satisfy all
other empirical criteria of statistical emissions. The observed slope anomaly
was found to be largest for lithium and decreases at higher excitation energy.
These results could not be understood by adjusting the parameters of the
statistical models or from reaction dynamics and might require examining the
statistical model from a quantum mechanical perspective. | | Source: | arXiv, 1306.3697 | | Services: | Forum | Review | PDF | Favorites | |
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