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Updated: Jun 24, 2026

Studying Soft-matter and Biological Systems over a Wide Length-scale from Nanometer and Micrometer Sizes at the Small-angle Neutron Diffractometer KWS-2
11:27

Studying Soft-matter and Biological Systems over a Wide Length-scale from Nanometer and Micrometer Sizes at the Small-angle Neutron Diffractometer KWS-2

Published on: December 8, 2016

N=8 Shell Breaking in ^{12}Be from a Single-Particle Perspective.

J Chen1,2, B P Kay2, D K Sharp3

  • 1Southern University of Science and Technology, Department of Physics, Shenzhen, 518055, Guangdong, China.

Physical Review Letters
|June 22, 2026
PubMed
Summary
This summary is machine-generated.

Researchers studied ^{12}Be nuclear structure to understand the N=8 magic number

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A Method for Studying the Temperature Dependence of Dynamic Fracture and Fragmentation
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Last Updated: Jun 24, 2026

Studying Soft-matter and Biological Systems over a Wide Length-scale from Nanometer and Micrometer Sizes at the Small-angle Neutron Diffractometer KWS-2
11:27

Studying Soft-matter and Biological Systems over a Wide Length-scale from Nanometer and Micrometer Sizes at the Small-angle Neutron Diffractometer KWS-2

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A Method for Studying the Temperature Dependence of Dynamic Fracture and Fragmentation
09:12

A Method for Studying the Temperature Dependence of Dynamic Fracture and Fragmentation

Published on: June 28, 2015

Area of Science:

  • Nuclear Physics
  • Atomic Physics
  • Quantum Mechanics

Background:

  • The N=8 magic number is a fundamental concept in nuclear structure.
  • Experimental data on ^{12}Be has been ambiguous, hindering understanding of shell closures.

Purpose of the Study:

  • To experimentally investigate the low-lying states in ^{12}Be.
  • To clarify the disappearance of the N=8 magic number and test theoretical models.

Main Methods:

  • Utilized a one-neutron adding (d, p) reaction on ^{11}Be.
  • Employed the ISOLDE Solenoidal Spectrometer at CERN's HIE-ISOLDE facility.
  • Determined single-particle energies and spectroscopic factors for ^{12}Be.

Main Results:

  • Resolved experimental ambiguities in ^{12}Be nuclear structure.
  • Found a significant reduction in orbital separation, indicating N=8 shell breakdown.
  • Identified core deformation and weak binding as key mechanisms for shell breaking.

Conclusions:

  • ^{12}Be exhibits exotic phenomena, including near-threshold resonances and potential halo structure.
  • The findings challenge traditional nuclear shell models and highlight the importance of collective effects and binding energies.