Physics Letters B (Jun 2019)
New high precision study on the decay width of the Hoyle state in 12C
- T.K. Rana,
- S. Bhattacharya,
- C. Bhattacharya,
- S. Manna,
- Samir Kundu,
- K. Banerjee,
- R. Pandey,
- Pratap Roy,
- A. Dhal,
- G. Mukherjee,
- V. Srivastava,
- A. Dey,
- A. Chaudhuri,
- T.K. Ghosh,
- A. Sen,
- Md.A. Asgar,
- T. Roy,
- J.K. Sahoo,
- J.K. Meena,
- A.K. Saha,
- R.M. Saha,
- M. Sinha,
- Amit Roy
Affiliations
- T.K. Rana
- Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India; Corresponding author.
- S. Bhattacharya
- Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India
- C. Bhattacharya
- Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India; Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
- S. Manna
- Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India; Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
- Samir Kundu
- Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India; Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
- K. Banerjee
- Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India; Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
- R. Pandey
- Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India
- Pratap Roy
- Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India; Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
- A. Dhal
- Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India
- G. Mukherjee
- Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India; Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
- V. Srivastava
- Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India
- A. Dey
- Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India
- A. Chaudhuri
- Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India; Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
- T.K. Ghosh
- Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India; Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
- A. Sen
- Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India; Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
- Md.A. Asgar
- Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India; Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
- T. Roy
- Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India; Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
- J.K. Sahoo
- Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India
- J.K. Meena
- Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India
- A.K. Saha
- Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India
- R.M. Saha
- Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India
- M. Sinha
- Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India
- Amit Roy
- Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India
- Journal volume & issue
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Vol. 793
pp. 130 – 133
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. Keywords: 3α cluster state, 12C(α, α)3α reaction, Complete kinematics reaction, The Hoyle state decay, Direct versus sequential decay, Inelastic scattering
