New high precision study on the decay width of the Hoyle state in 12C
T. K. Rana(Variable Energy Cyclotron Centre), S. Bhattacharya(Variable Energy Cyclotron Centre), C. Bhattacharya(Homi Bhabha National Institute), S. Manna(Variable Energy Cyclotron Centre), Samir Kundu(Variable Energy Cyclotron Centre), K. Banerjee(Homi Bhabha National Institute), R. Pandey(Variable Energy Cyclotron Centre), Pratap Roy(Variable Energy Cyclotron Centre), A. Dhal(Variable Energy Cyclotron Centre), G. Mukherjee(Homi Bhabha National Institute), V. Srivastava(Variable Energy Cyclotron Centre), A. Dey(Variable Energy Cyclotron Centre), A. K. Chaudhuri(Homi Bhabha National Institute), T. K. Ghosh(Homi Bhabha National Institute), Amit Sen(Homi Bhabha National Institute), Md. A. Asgar(Variable Energy Cyclotron Centre), T. Roy(Homi Bhabha National Institute), J. K. Sahoo(Variable Energy Cyclotron Centre), Jitendra Kumar Meena(Variable Energy Cyclotron Centre), A. Saha(Variable Energy Cyclotron Centre), R. M. Saha(Variable Energy Cyclotron Centre), M. K. Sinha(Variable Energy Cyclotron Centre), Amit Roy(Homi Bhabha National Institute)
Cited by 38Open Access
Abstract
Precise estimation of the rare direct 3α decay of the Hoyle state of 12C has been made to unveil its unusual α-cluster configurations ranging from linear 3α chain structure to diffuse Bose gas as well as Bose Einstein condensate. The present new high precision, nearly zero background experimental study with 1.6×105 Hoyle events has converged on the upper limit for direct decay at ∼0.019% with 95% confidence limit, which is more than a factor of 2 lower than the limit obtained in the previous studies.
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