Fusion near and below the Barrier: New Results and Challenges

M. Dasgupta; D. J. Hinde; C. Low; J. O. Newton

doi:10.1063/1.2338350

Fusion near and below the Barrier: New Results and Challenges

M. Dasgupta^*, D. J. Hinde, C. Low, J. O. Newton

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

13 Citations (Scopus)

Abstract

The cross-sections for fusion of ¹⁶O with ²⁰⁴Pb and ²⁰⁸Pb have been measured down to ∼ 8 MeV below the average barrier. The cross-sections fall more rapidly than is predicted by coupled channels models including collective couplings, when using a Woods-Saxon nuclear potential with diffuseness of ≃ 0.65 fm. The logarithmic slope of the data saturates at deep sub-barrier energies, and is a factor of ≃ 1.4 higher than the predictions. At energies well-above the barrier too, the measured cross-sections lie below the predictions of coupled channels calculations. Taken together, these observations lead us to question whether the current models of fusion need to be developed further to explain the measurements well-below and well-above the barrier.

Original language	English
Title of host publication	Fusion06
Subtitle of host publication	Reaction Mechanisms and Nuclear Structure at the Coulomb Barrier
Pages	21-28
Number of pages	8
DOIs	https://doi.org/10.1063/1.2338350
Publication status	Published - 2006
Event	FUSION06: Reaction Mechanisms and Nuclear Structure at the Coulomb Barrier - San Servolo, Venezia, Italy Duration: 19 Mar 2006 → 23 Mar 2006

Publication series

Name	AIP Conference Proceedings
Volume	853
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	FUSION06: Reaction Mechanisms and Nuclear Structure at the Coulomb Barrier
Country/Territory	Italy
City	San Servolo, Venezia
Period	19/03/06 → 23/03/06

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10.1063/1.2338350

Cite this

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title = "Fusion near and below the Barrier: New Results and Challenges",

abstract = "The cross-sections for fusion of 16O with 204Pb and 208Pb have been measured down to ∼ 8 MeV below the average barrier. The cross-sections fall more rapidly than is predicted by coupled channels models including collective couplings, when using a Woods-Saxon nuclear potential with diffuseness of ≃ 0.65 fm. The logarithmic slope of the data saturates at deep sub-barrier energies, and is a factor of ≃ 1.4 higher than the predictions. At energies well-above the barrier too, the measured cross-sections lie below the predictions of coupled channels calculations. Taken together, these observations lead us to question whether the current models of fusion need to be developed further to explain the measurements well-below and well-above the barrier.",

keywords = "Below-barrier cross-sections, Fusion excitation functions, Tunnelling",

author = "M. Dasgupta and Hinde, {D. J.} and C. Low and Newton, {J. O.}",

year = "2006",

doi = "10.1063/1.2338350",

language = "English",

isbn = "073540349X",

series = "AIP Conference Proceedings",

pages = "21--28",

booktitle = "Fusion06",

note = "FUSION06: Reaction Mechanisms and Nuclear Structure at the Coulomb Barrier ; Conference date: 19-03-2006 Through 23-03-2006",

}

Dasgupta, M , Hinde, DJ, Low, C & Newton, JO 2006, Fusion near and below the Barrier: New Results and Challenges. in Fusion06: Reaction Mechanisms and Nuclear Structure at the Coulomb Barrier. AIP Conference Proceedings, vol. 853, pp. 21-28, FUSION06: Reaction Mechanisms and Nuclear Structure at the Coulomb Barrier, San Servolo, Venezia, Italy, 19/03/06. https://doi.org/10.1063/1.2338350

TY - GEN

T1 - Fusion near and below the Barrier

T2 - FUSION06: Reaction Mechanisms and Nuclear Structure at the Coulomb Barrier

AU - Dasgupta, M.

AU - Hinde, D. J.

AU - Low, C.

AU - Newton, J. O.

PY - 2006

Y1 - 2006

N2 - The cross-sections for fusion of 16O with 204Pb and 208Pb have been measured down to ∼ 8 MeV below the average barrier. The cross-sections fall more rapidly than is predicted by coupled channels models including collective couplings, when using a Woods-Saxon nuclear potential with diffuseness of ≃ 0.65 fm. The logarithmic slope of the data saturates at deep sub-barrier energies, and is a factor of ≃ 1.4 higher than the predictions. At energies well-above the barrier too, the measured cross-sections lie below the predictions of coupled channels calculations. Taken together, these observations lead us to question whether the current models of fusion need to be developed further to explain the measurements well-below and well-above the barrier.

AB - The cross-sections for fusion of 16O with 204Pb and 208Pb have been measured down to ∼ 8 MeV below the average barrier. The cross-sections fall more rapidly than is predicted by coupled channels models including collective couplings, when using a Woods-Saxon nuclear potential with diffuseness of ≃ 0.65 fm. The logarithmic slope of the data saturates at deep sub-barrier energies, and is a factor of ≃ 1.4 higher than the predictions. At energies well-above the barrier too, the measured cross-sections lie below the predictions of coupled channels calculations. Taken together, these observations lead us to question whether the current models of fusion need to be developed further to explain the measurements well-below and well-above the barrier.

KW - Below-barrier cross-sections

KW - Fusion excitation functions

KW - Tunnelling

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U2 - 10.1063/1.2338350

DO - 10.1063/1.2338350

M3 - Conference contribution

SN - 073540349X

SN - 9780735403499

T3 - AIP Conference Proceedings

SP - 21

EP - 28

BT - Fusion06

Y2 - 19 March 2006 through 23 March 2006

ER -

Fusion near and below the Barrier: New Results and Challenges

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