https://doi.org/10.1140/epja/i2019-12887-x
Review
Gamma-decay from dipole vibrations: Probe for nuclear properties
1
Dipartimento di Fisica dell’Università di Milano, Via Celoria 16, 20133, Milano, Italy
2
Istituto Nazionale Fisica Nucleare, Sezione di Milano, Via Celoria 16, 20133, Milano, Italy
* e-mail: franco.camera@mi.infn.it
Received:
11
June
2019
Accepted:
19
September
2019
Published online:
3
December
2019
A review of selected experimental works on the gamma-decay from the Giant and Pygmy Dipole Resonances is presented. The common feature of these experiments is that gamma-decay originates from dipole states populated using reactions induced by heavy ions. The focus is the investigation of dipole modes built on the ground and excited states. The major developments made during the years regarding the detection of high-energy gamma-rays are briefly discussed together with specific results concerning a chosen number of problems among those that were addressed by the theoretical works of P.F. Bortignon. They are: i) the dipole mode in the initial stages of reactions among heavy ions with different 
values for the target and projectile; ii) the problem of isospin symmetry in nuclei at finite temperature; iii) pygmy states far from stability; iv) the nature of the pygmy states.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature, 2019
