An experiment to measure the 2β ^– decay of ¹⁵⁰Nd to excited levels of ¹⁵⁰Sm using a highly purified 2.381 kg sample of Nd₂O₃ is in progress in the low-background set-up with 4 HPGe detectors (∼225 cm³ volume each). The detector is located deep underground (3600 m w.e.) at the STELLA facility of the Gran Sasso National Laboratory (LNGS) of the INFN (Italy). Two γ quanta with energies 334.0 keV and 406.5 keV emitted after deexcitation of the 0₁ ⁺ excited level of ¹⁵⁰Sm have been observed in the experimental data accumulated over 39898 h. The preliminary half-life value for 2β ^– decay of ¹⁵⁰Nd to the first 0⁺ excited level in ¹⁵⁰Sm (after the exposure of 10.8 kgנyr) was estimated as yr. The experiment is under data taking with the aim to improve the statistical uncertainties.

使用高纯度的 2.381 kg Nd ₂ O ₃样品测量¹⁵⁰ Nd的 2 β ^-衰变到¹⁵⁰ Sm激发水平的实验正在低背景设置中进行，该设置具有 4 个 HPGe 探测器（~225 cm ³每个音量）。探测器位于 INFN（意大利）格兰萨索国家实验室 (LNGS) 的 STELLA 设施的地下深处 (3600 m we)。在 39898 小时累积的实验数据中观察到在¹⁵⁰ Sm的 0 ₁ ⁺激发能级去激发后发射的能量为 334.0 keV 和 406.5 keV 的两个γ量子。2 的初步半衰期值 β ^{– 150} Nd衰减到¹⁵⁰ Sm 中的第一个 0 ⁺激发水平（在暴露 10.8 kgנyr 之后）估计为yr。实验正在进行数据采集，旨在改善统计不确定性。