تقرير
Signature of clustering in quantum many body systems probed by the giant dipole resonance
| العنوان: | Signature of clustering in quantum many body systems probed by the giant dipole resonance |
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| المؤلفون: | Pandit, Deepak, Mondal, Debasish, Dey, Balaram, Bhattacharya, Srijit, Mukhopadhyay, S., Pal, Surajit, De, A., Banerjee, S. R. |
| المصدر: | Physical Review C 95, 034301 (2017) |
| سنة النشر: | 2017 |
| المجموعة: | Nuclear Experiment |
| مصطلحات موضوعية: | Nuclear Experiment |
| الوصف: | The present experimental study illustrates how large deformations attained by nuclei due to cluster formation are perceived through the giant dipole resonance (GDR) strength function. The high energy GDR $\gamma$-rays have been measured from $^{32}$S at different angular momenta ($J$) but similar temperatures in the reactions $^{4}$He(E$_{lab}$=45MeV) + $^{28}$Si and $^{20}$Ne(E$_{lab}$=145MeV) + $^{12}$C. The experimental data at lower J ($\sim$ 10$\hbar$) suggests a normal deformation, similar to the ground state value, showing no potential signature of clustering. However, it is found that the GDR lineshape is fragmented into two prominent peaks at high J ($\sim$ 20$\hbar$) providing a direct measurement of the large deformation developed in the nucleus. The observed lineshape is also completely different from the ones seen for Jacobi shape transition at high $J$ pointing towards the formation of cluster structure in super-deformed states of $^{32}$S at such high spin. Thus, the GDR can be regarded as a unique tool to study cluster formation at high excitation energies and angular momenta. Comment: Published in PRC, 6 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevC.95.034301 |
| الوصول الحر: | http://arxiv.org/abs/1703.01749Test |
| رقم الانضمام: | edsarx.1703.01749 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevC.95.034301 |
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