The study of rare 𝛼 decays [1,2] plays a crucial role in the developments of nuclear physics because it can provide detailed information about the nuclear structure, including excited levels and their properties. In particular, the phenomenon of 𝛼 decay can provide information about fusion-fission reactions since such a decay involves sub-barrier penetration due to the nucleus and the 𝛼 particle interaction [3]. Nuclear and particle astrophysics studies require deep knowledge on the nuclear properties. For example, the 𝛼-capture reactions (equivalent to the inverse 𝛼-decay) are important for nucleosynthesis and for 𝛽-delayed fission [4]; together with other fission modes, they determine the so-called “fission recycling” in the r-process nucleosynthesis [2]. The 𝛼 decay is also interesting for the investigations of superheavy elements and for searches for new stable elements in a longtime-ago predicted island of stability [5]. One interesting direction in the 𝛼 decay studies is the investigation of long-lived 𝛼 decaying nuclides having decay energy lower than 3 MeV and very long half-life (≃ 1014−24 yr). It is extremely difficult to detect such decays with conventional techniques, but significant progresses have been made in this field during the past decade, mostly because of the developments and applications of new experimental techniques and of improvements of well-known ones. A recent review on the investigations of rare 𝛼 decays and achieved results is given in [1] and references therein.
Belli, P., Bernabei, R., Cappella, F., Caracciolo, V., Cerulli, R., Incicchitti, A., et al. (2025). A new measurement of 174Hf alpha decay. NUCLEAR PHYSICS. A, 1053 [10.1016/j.nuclphysa.2024.122976].
A new measurement of 174Hf alpha decay
Caracciolo, V.;Leoncini, A.;Merlo, V.;
2025-01-01
Abstract
The study of rare 𝛼 decays [1,2] plays a crucial role in the developments of nuclear physics because it can provide detailed information about the nuclear structure, including excited levels and their properties. In particular, the phenomenon of 𝛼 decay can provide information about fusion-fission reactions since such a decay involves sub-barrier penetration due to the nucleus and the 𝛼 particle interaction [3]. Nuclear and particle astrophysics studies require deep knowledge on the nuclear properties. For example, the 𝛼-capture reactions (equivalent to the inverse 𝛼-decay) are important for nucleosynthesis and for 𝛽-delayed fission [4]; together with other fission modes, they determine the so-called “fission recycling” in the r-process nucleosynthesis [2]. The 𝛼 decay is also interesting for the investigations of superheavy elements and for searches for new stable elements in a longtime-ago predicted island of stability [5]. One interesting direction in the 𝛼 decay studies is the investigation of long-lived 𝛼 decaying nuclides having decay energy lower than 3 MeV and very long half-life (≃ 1014−24 yr). It is extremely difficult to detect such decays with conventional techniques, but significant progresses have been made in this field during the past decade, mostly because of the developments and applications of new experimental techniques and of improvements of well-known ones. A recent review on the investigations of rare 𝛼 decays and achieved results is given in [1] and references therein.File | Dimensione | Formato | |
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