Dissociation energies of gold clusters AuN+, N=7-27
Phys. Rev. A 73 (6), 063202, June 2006
Submitted to Cluster Science: 5 January 2010
Last Update: 6 January 2011

10.1103/PhysRevA.73.063202
OA Status: unknown

Abstract

Unimolecular decay rates and monomer-dimer branching ratios of gold clusters AuN+ (N=7–27) have been measured as a function of excitation energy in photodissociation experiments on size-selected clusters stored in a Penning trap. Part of the data set has previously been used to extract model-free values of dissociation energies [Vogel et al., Phys. Rev. Lett. 87, 013401 (2001)]. Other parts of the data set do not allow this analysis. We use these data to extract tentative dissociation energies, based on the systematics of deviations between an Arrhenius analysis and the model-free values. The observed systematics also allows an estimate of the true frequency factor which often is much higher than the Arrhenius value but in good agreement with the expected detailed balance value. The data are also reanalyzed including radiative cooling which may explain part of the discrepancy between model-free and Arrhenius dissociation-energy values.

Classifications

Document Type experimental and theoretical
Research Field Charging Phenomena, Collisions and Fragmentation Processes

94 references, 20 in database

1.


Rev. Sci. Instrum. 66 (10), 4902–4910, October 1995.
2.


J. Chem. Phys. 101 (5), 3506–3513, September 1994.
3.


J. Chem. Phys. 112 (2), 752–760, January 2000.
4.


Int. J. Mass Spectrom. 227 (1), 87–96, May 2003.
5.

Phys. Rev. A 57 (4), 2786–2793, April 1998.
6.

Int. J. Mass Spectrom. Ion Processes 155 (3), 141–148, November 1996.
7.


J. Chem. Phys. 114 (7), 2955–2962, February 2001.
8.

Z. Phys. D 40 (1–4), 347–350, May 1997.
9.


Phys. Lett. A 158 (5), 247–252, September 1991.
10.


Eur. Phys. J. D 9 (1–4), 15–20, December 1999.
11.


Int. J. Mass Spectrom. 219 (2), 363–371, August 2002.
12.


Appl. Phys. B 73 (4), 411–416, 2001.
13.


Chem. Phys. Lett. 346 (1–2), 117–122, September 2001.
14.


Eur. Phys. J. D 21 (2), 163–166, 2002.
15.

Eur. Phys. J. D 16 73–76, 2001.
16.


J. Am. Soc. Mass Spectrom. 14 (6), 614–621, June 2003.
17.


J. Chem. Phys. 116 (22), 9658–9662, June 2002.
18.


J. Phys. B 36 (5), 1073–1083, March 2003.
19.


Phys. Rev. Lett. 83 (19), 3816–3819, November 1999.
20.

Eur. Phys. J. D 12 (1), 161–169, 2000.