Abstract
A microscopic α+α+Λ+Λ four-body problem for the 10ΛΛBe hypernucleus is formulated and solved for the ground (positive parity) and excited (negative parity) bands. Energy properties, electric transition probabilities and reduced width amplitudes (spectroscopic factors) for the 6ΛΛHe+α, 5ΛHe+5ΛHe and 9ΛBe+Λ channels are calculated and discussed in comparison with those of 9ΛBe.