The angular distribution of desorbing N-2 was studied in transient N2O decomposition on Rh(1 1 0) by both pressure jump and temperature-programmed decomposition (TPD). Even at 60 K, N2O was decomposed, emitting N-2 along either around 68 or 30 degrees off normal towards the [0 0 1] direction. In the latter TPD, N-2 desorption yielded five peaks in the range of 70-160 K. Four of them involved desorption in similarly inclined ways. (c) 2004 Published by Elsevier B.V.