SEARCH Articles Figures Tables Properties of selected nuclei observed by Mossbauer spectroscopy. The radioisotope source provides the y-radiation required for the Mossbauer effect. [Publishers Imprint] See Also: Properties of selected nuclei observed by Mossbauer spectroscopy. The radioisotope source provides the y-radiation required for the Mossbauer effect. Properties of selected nuclei observed by Mossbauer spectroscopy. The radioisotope source provides the y-radiation required for the Mossbauer effect.