Nuclear transfer reactions on exotic nuclei

- Supervisor:
**Pierre Descouvemont** - Research center:
**PNTPM** - Research start date:
**01.10.2019**

### Description

A large number of nuclei in the nuclear landscape (nuclear periodic table) are unstable, having structure and properties quite different as compared to their stable isotopes. Their understanding is crucial to expand our knowledge about nuclear physics, which so far is mainly based on the comprehension of the valley of stability. These nuclei are also important for nuclear astrophysics. In fact, the properties of these nuclei are essential cogs in theoretical calculations on stellar burning which, otherwise, are often forced to rely on global assumptions about nuclear masses, decays and level structures extracted from stable nuclei.

Apart from their short half-lives, these exotic nuclei, in most cases, have one or two bound states and a broad featureless continuum. Thus, methods of conventional nuclear structure studies, namely, measurements of energies and spin-parities of excited states are not readily applicable in these cases. On the other hand, advances in nuclear reaction study has opened new ways to study such nuclei.

Nuclear transfer reactions (where one or more nucleons get transferred from the projectile to the target or vice versa) are one of the type of reactions being used for this purpose. In this regard, we are developing the computational tools for the transfer reactions by utilizing the Lagrange-mesh and R-matrix methods, which lead to faster and accurate numerical computations. Besides the structural information about the exotic nuclei, we also aim to extract the extremely vital spectroscopic information for radiative capture reactions of astrophysical interests.

## Publications

**Publications in Referred Journals:**

1. Transfer reactions with the Lagrange-mesh method, **Shubhchintak** and P. Descouvemont, Physical Review C **100**, 034611 (2019).

2. Neutron capture rates of ^{18}C, M. Dan, G. Singh, R. Chatterjee and **Shubhchintak**, Physical Review C **99**, 035801 (2019).

3. Low-lying dipole strengths for probable p-wave one-neutron halos in the medium mass region, Manju, Jagjit Singh, **Shubhchintak **and R. Chatterjee, European Physical Journal A **55**, 5 (2019).

4. Impact of ^{7}Be(α, γ)^{11}C reaction on the primordial abundance of ^{7}Li, M. Hartos, C. A. Bertulani, **Shubhchintak**, A. M. Mukhamedzhanov and S. Hou, The Astrophysical Journal 862, 62 (2018).

5. Maris polarization in neutron-rich nuclei, **Shubhchintak**, C. A. Bertulani and T. Aumann, Physics Letters B **778**, 30 (2018).

6. Excited-state one-neutron halo nuclei within a parallel momentum distribution analysis, **Shubhchintak**, Physical Review C **96**, 024615, (2017).

7. Subthreshold resonances and resonances in the R-matrix method for binary reactions and in the Trojan Horse method, A. M. Mukhamedzhanov, **Shubhchintak** and C. A. Bertulani, Physical Review C **96**, 024623 (2017).

8. Determination of the rate of ^{36}Mg(n, γ)^{37}Mg reaction from the Coulomb dissociation of ^{37}Mg, **Shubhchintak**, R. Chatterjee, R. Shyam, Physical Review C **96**, 025804 (2017).

9. Structural effects of ^{34}Na in the ^{33}Na(n, γ)^{34}Na radiative capture reaction, G. Singh, **Shubhchintak** and R. Chatterjee, Physical Review C **95**, 065806 (2017).

10. Internal and external radiative widths in the R-matrix formalism, A. M. Mukhamedzhanov, **Shubhchintak**, C. A. Bertulani and T. V. Nhan Hao, Physical Review C **95**, 024616 (2017).

11. Radiative nucleon capture with quasi-separable potentials, **Shubhchintak**, C. A. Bertulani, A. M. Mukhamedzhanov and A. T. Kruppa, Journal of Physics G: Nuclear and Particle Physics **43**, 125203 (2016).

12. Elastic Coulomb breakup of 34Na, G. Singh, **Shubhchintak** and R. Chatterjee, Physical Review C **94**, 024606 (2016).

13. Primordial α + d → ^{6}Li + γ reaction and second Lithium puzzle, A. M. Mukhame-dzhanov, Shubhchintak and C. A. Bertulani, Physical Review C **93**, 045805 (2016).

14. Structure effects in the ^{15}N(n, γ)^{16}N radiative capture reaction from the Coulomb dissociation of ^{16}N, Neelam, **Shubhchintak** and R. Chatterjee, Physical Review C **92**, 044615 (2015).

15. Coulomb breakup of ^{37}Mg and its ground state structure, **Shubhchintak**, Neelam, R. Chatterjee, R. Shyam and K. Tsushima Nuclear Physics A **939**, 101 (2015).

16. Deformation effects in the Coulomb breakup of ^{31}Ne, Shubhchintak and R. Chatterjee, Nuclear Physics A **922**, 99 (2014).

17. Breakdown of N = 8 magic number near the neutron drip line from parallel momentum distribution analyses, Shubhchintak and R. Chatterjee, Physical Review C **90**, 017602 (2014).

18. Capture cross section and rate of the ^{14}C(n, γ)^{15}C reaction from the Coulomb dissociation of ^{15}C, Shubhchintak, Neelam and R. Chatterjee, Pramana Journal of Physics, **83**, 533 (2014).

**Publications in referred Conferences:**

1. Cosmological Lithium Problems, C. A. Bertulani, **Shubhchintak**, A.M.Mukhamedzhanov, EPJ Web of Conferences, **184**, 01002 (2018).

2. Pigmy resonances, transfer, and separable potentials, C. A. Bertulani, A. S. Kadyrov, A. T. Kruppa, T. V. Nhan Hao, A. M. Mukhamedzhanov and **Shubhchintak**, AIP Conference Proceedings, **1852**, 020004 (2017).

3. The Cosmological Lithium Problem Revisited, C. A. Bertulani, A. M. Mukhamed-zhanov and **Shubhchintak**, AIP Conference Proceedings, **1753**, 040001 (2016).

4. Projectile deformation effects in the breakup of ^{37}Mg, **Shubhchintak**, R. Chatterjee, and R. Shyam, EPJ Web of Conferences, **117**, 06010 (2016).

5. Indirect methods in nuclear astrophysics, C. A. Bertulani, **Shubhchintak**, A. M. Mukhamedzhanov, A. S. Kadyrov, A. Kruppa and D. Y. Pang, Journal of Physics conference Series, **703**, 012007 (2016).

6. Coulomb breakup of deformed halo nuclei, **Shubhchintak** and R. Chatterjee, JPS Conference Proceedings, **6**, 030078 (2015).

7. On the Coulomb breakup of exotic nuclei, R. Chatterjee and **Shubhchintak**, Nuclear Theory, Vol **33**, 179 (2014).

8. Progress in breakup reaction theory with three charged particles in the final state, **Shubhchintak** and R. Chatterjee, AIP Conference Proceedings **1524**, 213 (2013).