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As liquid xenon detectors grow in scale, novel techniques are required to maintain sufficient purity for charges to survive across longer drift paths. The Xeclipse facility at Columbia University was built to test the removal of electronegative impurities through cryogenic filtration powered by a liquid xenon pump, enabling a far higher mass flow rate than gas-phase purification through heated getters. In this paper, we present results from Xeclipse, including measured oxygen removal rates for two sorbent materials, which were used to guide the design and commissioning of the XENONnT liquid purification system. Thanks to this innovation, XENONnT has achieved an electron lifetime greater than 10ms in an ∼8.6tonne total mass, perhaps the highest purity ever measured liquid xenon detector.

Current trends within both religious and secular communities suggest that contemporary times mean that people spend more time alone than with others. Community engagement in general has been declining, while religious and spiritual community engagement in particular has dropped off significantly in recent decades, and most especially following the COVID-19 global pandemic. Although humans are social beings and benefit from community engagement, we tend to avoid or minimize our affiliations and associations, including our religious and spiritual ones today. Religious and spiritual communities must adapt to changing times or risk becoming irrelevant, diminishing further, and losing their sustainability to continue with their activities and services. Religious communities might wish to consider the best state-of-the-art evidence-based practices to engage their members, as well as appeal to those who might be interested in joining with them. There are many mental and physical health benefits to active engagement with spiritual religious practices and communities. The world could use more rather than less community engagement, including religious and spiritual engagement, during our challenging contemporary times.

The college experience can be a critically important and enriching time for personal as well as academic growth and development. For many students, college is their first foray into a more independent world and lifestyle no longer under the careful, and sometimes critical, eyes of their parents, families, and schoolteachers. When students go far away from home to attend college, they need to find ways to live independently, manage their many needs, and attend to the rigors of academic life in higher education. Additionally, the college years offer a unique and important period for spiritual growth, development, and transformation. The purpose of this article is to highlight some of the developmental tasks and challenges of the college years and provide examples of how colleges can be intentional and strategic about spiritual growth and development by focusing on strategies offered by Jesuit higher education.

Humans have likely been attempting to communicate with entities believed to exist, such as the divine, sacred beings, and deceased people, since the dawn of time. Across cultures and countries, many believe that interaction with the immaterial world is not only possible but a frequent experience. Most religious traditions across the globe focus many rituals and activities around prayer to an entity deemed divine or sacred. Additionally, many people–religious, agnostic, and atheists alike–report communication with their departed loved ones. During highly stressful times associated with natural disasters, war, pandemics, and other threats to human life, the frequency and intensity of these activities and associated experiences substantially increase. Although this very human phenomenon seems to be universal, the empirical literature on the topic within psychology is thin. This paper discussed the topic and reviews what we know from the professional literature about how people perceive communication with these unseen entities. It highlights the perceptual and social cognition evidence and discussed the role of attribution theory, which might help us understand the beliefs, motivations, and practices of those engaged with communication with the unseen. Empirical laboratory research with mediums is discussed as well, examining the evidence for communication with the deceased. Final reflections and suggestions for future research are also offered.

Objective and Participants: The authors evaluated the effects on stress, rumination, forgiveness, and hope of two 8-week, 90-min/wk training programs for college undergraduates in meditation-based stress-management tools. Methods: After a pretest, the authors randomly allocated college undergraduates to training in mindfulness-based stress reduction (MBSR; n = 15), Easwaran's Eight-Point Program (EPP; n = 14), or wait-list control (n = 15). The authors gathered pretest, posttest, and 8-week follow-up data on self-report outcome measures. Results: The authors observed no post-treatment differences between MBSR and EPP or between posttest and 8-week follow-up (p > .10). Compared with controls, treated participants (n = 29) demonstrated significant benefits for stress (p < .05, Cohen's d = -.45) and forgiveness (p < .05, d = .34) and marginal benefits for rumination (p < .10, d = -.34). Conclusions: Evidence suggests that meditation-based stress-management practices reduce stress and enhance forgiveness among college undergraduates. Such programs merit further study as potential health-promotion tools for college populations.

The XENON1T experiment aims for the direct detection of dark matter in a detector filled with 3.3 tons of liquid xenon. In order to achieve the desired sensitivity, the background induced by radioactive decays inside the detector has to be sufficiently low. One major contributor is the β -emitter 85 Kr which is present in the xenon. For XENON1T a concentration of natural krypton in xenon nat Kr / Xe < 200 ppq   (parts per quadrillion,  1 ppq = 10 - 15 mol / mol ) is required. In this work, the design, construction and test of a novel cryogenic distillation column using the common McCabe–Thiele approach is described. The system demonstrated a krypton reduction factor of 6.4 · 10 5 with thermodynamic stability at process speeds above 3 kg/h. The resulting concentration of nat Kr / Xe < 26 ppq is the lowest ever achieved, almost one order of magnitude below the requirements for XENON1T and even sufficient for future dark matter experiments using liquid xenon, such as XENONnT and DARWIN.

The low-background, VUV-sensitive 3-inch diameter photomultiplier tube R11410 has been developed by Hamamatsu for dark matter direct detection experiments using liquid xenon as the target material. We present the results from the joint effort between the XENON collaboration and the Hamamatsu company to produce a highly radio-pure photosensor (version R11410-21) for the XENON1T dark matter experiment. After introducing the photosensor and its components, we show the methods and results of the radioactive contamination measurements of the individual materials employed in the photomultiplier production. We then discuss the adopted strategies to reduce the radioactivity of the various PMT versions. Finally, we detail the results from screening 286 tubes with ultra-low background germanium detectors, as well as their implications for the expected electronic and nuclear recoil background of the XENON1T experiment.

The Examen is a 500-year-old end of day prayer developed by St. Ignatius of Loyola, founder of the Society of Jesus (better known as the Jesuits). Like many other religious or spiritual practices, such as mindfulness and yoga, the Examen is suitable as either a spiritually focused or secular intervention strategy to assist people within clinical psychotherapy practice and elsewhere. Adapting the Examen as a cognitive behavioral psychotherapy intervention is easy to do and may add another important tool to the toolbox of practicing clinicians interested in thoughtfully integrating spiritually based approaches in their clinical work with religiously as well as nonreligiously minded clients.

While a large body of research literature has explored the assessment, treatment, and prevention of worker burnout, much less research has focused on the unique issues associated with burnout in religious organizations, especially within the Roman Catholic Church. Catholic Church employees, whether clerics or laypersons, are embedded within a 2,000-year-old global hierarchical structure and organization that is unique in that it includes clerics with vows of chastity, obedience, and often poverty as well as ongoing crises related to clerical sexual abuse scandals, significant financial stressors, and a faith tradition that often overvalues sacrifice and suffering. The purpose of this brief article is to highlight burnout issues among Roman Catholic Church employees and offer principles and strategies for recognizing, treating, and avoiding burnout among these professionals. Five key principles for burnout management as well as several case examples are also presented.

In this paper, we describe the XENON100 data analyses used to assess the target-intrinsic background sources radon ([InlineMediaObject not available: see fulltext.]), thoron ([InlineMediaObject not available: see fulltext.]) and krypton ([InlineMediaObject not available: see fulltext.]). We detail the event selections of high-energy alpha particles and decay-specific delayed coincidences. We derive distributions of the individual radionuclides inside the detector and quantify their abundances during the main three science runs of the experiment over a period of ∼4years, from January 2010 to January 2014. We compare our results to external measurements of radon emanation and krypton concentrations where we find good agreement. We report an observed reduction in concentrations of radon daughters that we attribute to the plating-out of charged ions on the negatively biased cathode.