Diffraction of neutral helium clusters:: Evidence for "magic numbers" -: art. no. 185301

被引：62

作者：

Brühl, R

Guardiola, R

Kalinin, A

Kornilov, O

Navarro, J

Savas, T

Toennies, JP

机构：

[1] Max Planck Inst Stromungsforsch, D-37073 Gottingen, Germany

[2] Fac Fis, Dept Fis Atom & Nucl, Burjassot 46100, Spain

[3] Univ Valencia, CSIC, IFIC, Valencia 46071, Spain

[4] MIT, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.92.185301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The size distributions of neutral He-4 clusters in cryogenic jet beams, analyzed by diffraction from a 100 nm period transmission grating, reveal magic numbers at N=10-11, 14, 22, 26-27, and 44 atoms. Whereas magic numbers in nuclei and clusters are attributed to enhanced stabilities, this is not expected for quantum fluid He clusters on the basis of numerous calculations. These magic numbers occur at threshold sizes for which the quantized excitations calculated with the diffusion Monte Carlo method are stabilized, thereby providing the first experimental confirmation for the energy levels of He-4 clusters.

引用

页码：185301 / 1

页数：4

共 20 条

[11] Excited states of 4He droplets -: art. no. 224519 [J].