Theoretical Study of Pressure Broadening of Lithium Resonance Lines by Helium Atoms

Quantum mechanical calculations are performed of the emission and absorption profiles of the lithium 2s-2p resonance line under the influence of a helium perturbing gas. We use carefully constructed potential energy surfaces and transition dipole moments to compute the emission and absorption coefficients at temperatures from 200 to 3000 K at wavelengths between 500 nm and 1000 nm. Contributions from quasi-bound states are included. The resulting red and blue wing profiles are compared with previous theoretical calculations and with an experiment, carried out at a temperature of 670 K.Comment: 10 figure

Theoretical Study of Sodium and Potassium Resonance Lines Pressure Broadened by Helium Atoms

We perform fully quantum mechanical calculations in the binary approximation of the emission and absorption profiles of the sodium $3s$-$3p$ and potassium $4s$-$4p$ resonance lines under the influence of a helium perturbing gas. We use carefully constructed potential energy surfaces and transition dipole moments to compute the emission and absorption coefficients at temperatures from 158 to 3000 K. Contributions from quasi-bound states are included. The resulting red and blue wing profiles agree well with previous theoretical calculations and with experimental measurements.Comment: 16 figure

Dynamics of OH(2Pi)-He collisions in combined electric and magnetic fields

We use accurate quantum mechanical calculations to analyze the effects of parallel electric and magnetic fields on collision dynamics of OH(2Pi) molecules. It is demonstrated that spin relaxation in 3He-OH collisions at temperatures below 0.01 K can be effectively suppressed by moderate electric fields of order 10 kV/cm. We show that electric fields can be used to manipulate Feshbach resonances in collisions of cold molecules. Our results can be verified in experiments with OH molecules in Stark decelerated molecular beams and electromagnetic traps.Comment: 20 pages, 5 figures, submitted to Faraday Discuss. 142: Cold and Ultracold Molecule

The Solar Wind Charge-eXchange contribution to the Local Soft X-ray Background. Model to data comparison in the 0.1-1.0 keV band

The major sources of the Soft X-ray Background (SXRB), besides distinct structures as supernovae and superbubbles (e.g. Loop I), are: (i) an absorbed extragalactic emission following a power law, (ii) an absorbed thermal component ~2x10^6 K) from the galactic disk and halo, (iii) an unabsorbed thermal component, supposedly at 10^6 K, attributed to the Local Bubble and (iv) the very recently identified unabsorbed Solar Wind Charge-eXchange (SWCX) emission from the heliosphere and the geocorona. We study the SWCX heliospheric component and its contribution to observed data. In a first part, we apply a SWCX heliospheric simulation to model the oxygen lines (3/4 keV) local intensities during shadowing observations of the MBM12 molecular cloud and a dense filament in the south galactic hemisphere with Chandra, XMM-Newton, and Suzaku telescopes. In a second part, we present a preliminary comparison of SWCX model results with ROSAT and Wisconsin surveys data in the 1/4 keV band. We conclude that, in the 3/4 keV band, the total local intensity is entirely heliospheric, while in the 1/4 keV band, the heliospheric component seems to contribute significantly to the local SXRB intensity and has potentially a strong influence on the interpretation of the ROSAT and Wisconsin surveys data in terms of Local Bubble hot gas temperature.Comment: 15 pages, 7 figures, 2 tables, 'From the Outer Heliosphere to the Local Bubble' ISSI workshop, Bern October 200

Environmental DNA Based Surveillance for the Highly Invasive Carpet Sea Squirt Didemnum vexillum : A Targeted Single-Species Approach

Funding Information: The authors would like to thank the site operators, owners and Solway Firth Partnership for allowing access and sample collection at studied sites visited during this study. Thanks also to Frank Armstrong, Katy Beaton, Maria Campbell, Pablo Dias, James Dooley, Judith Horrill, Nial McLeod, Warren Murray, Andrea Taylor, Joe Triscott, and Bill Turrell for contributing to field work and sample collection. The authors thank National Museums Scotland and particularly Fiona Ware for the loan of reference material (specimen register number NMS.Z.2015.82.8, 9 and 14 and NMS.Z.2018.2.2) which was used in the present study. KS thank the Japan Society for the Promotion of Science for post-doctoral fellowship funding.Peer reviewedPublisher PD

Families with neurodevelopmental diagnoses are not ‘Hard to Reach’: findings from a feasibility trial comparing parenting programmes for parents of children with ADHD

Attention-Deficit/Hyperactivity Disorder (ADHD) is defined by impairing levels of inattention and/or hyperactivity-impulsivity. It occurs in at least 5% of school age children and 2.5% of adults worldwide, and is associated with multiple negative outcomes throughout life. There is good evidence to support the efficacy of pharmacological treatment of individuals affected, and also of behavioural training for parents of children with ADHD, though the optimal focus and format to support change has yet to be established. This feasibility, parallel-group, randomised, controlled, pilot trial examined the feasibility of comparing two parenting programmes for families of school-aged children with ADHD. Parents of children aged 5–12 years with a clinical diagnosis of ADHD, referred to a regional integrated ADHD pathway, were randomly allocated (1:1 in permuted blocks of 4) either to a Parents InC or Incredible Years (IY) parenting group. The primary feasibility outcomes were recruitment and retention rates. The putative primary effectiveness outcome measure was Parenting Sense of Competence Scale (PSOC) and secondary outcome measures included the behavioural, physical, and emotional functioning of the child as well as health and ADHD symptoms of the parents at 12 (or 6 in final four participants) months post-randomisation. Process and economic evaluations were also included. We recruited 30/52 (58%) eligible participants (14 randomised to Parents InC, 16 to IY). Twenty-two participants (73%) provided follow-up quantitative data and 24 (80%) participated in qualitative interviews. PSOC scores were suggestive of greater improvement in Parents InC groups than IY groups. Power calculations suggest we will need to recruit 230 participants for a definitive RCT. Health economic analysis showed Parents InC had a lower per-group costs. Participant feedback on research procedures and methods was positive, and interviews and process evaluation provided a rich source of learning points to take forward into a future trial. Trial registration Clinical Trials, protocol registration system: NCT03832270

Infant Parent Support (IPS): a multidisciplinary intervention to improve the mental health of children with a social worker - a study protocol for a feasibility randomised controlled trial with embedded process evaluation

Background: In many families where children have a social worker, parents have experienced challenges in their own childhoods or have neurodevelopmental conditions. These families often endure significant stress, which is frequently worsened by financial or housing challenges. This added pressure can strain relationships and increase the risk of child maltreatment, as well as contribute to mental health issues in children. Relationship-focused interventions show promise in preventing child maltreatment, although there are currently no interventions that simultaneously address neurodevelopmental conditions and the impact of poverty. We have co-produced, alongside parent experts-by-experience, local stakeholders, and infant mental health practitioners, a new service called Infant Parent Support (IPS). IPS will i) adopt a relationship-focused approach to comprehensive understanding of family functioning, ii) incorporate child and parent mental health and neurodevelopmental awareness, and iii) ensure a poverty aware approach throughout. The aim of this phase is to investigate the feasibility of a definitive Randomised Controlled Trial (RCT) of IPS compared with services-as-usual (SAU). Methods: The study settings are social care services in two local authorities: Glasgow City Council (Scotland) and the London Borough of Bromley (England). Our target population is children on a ‘child in need’ plan (or the Scottish equivalent) and eligible participants are families where i) the infant(s) are aged 0–5 years and ii) the family has an allocated social worker plus a multi-agency support plan. Thirty participants will be identified by social workers and randomised to receive either IPS or SAU. Families randomised to IPS will receive an intensive multidisciplinary attachment-focused assessment that provides a foundation for relationship-focused interventions. IPS will incorporate child and parent mental health and neurodevelopmental awareness and ensure a poverty aware approach throughout. Families randomised to SAU will receive the assessment and support that social care services normally implement. We will utilise a pre-post and 3/6-month follow-up design with embedded mixed-method process evaluation and exploratory economic analysis. The primary objective is to assess if enough families can be recruited, randomised, and retained in the trial such that a full-scale RCT is likely to be feasible. The secondary objectives are to assess the acceptability and feasibility of the planned outcome measures and the IPS intervention to families and professionals. Conclusions: A service like IPS, that uses a relationship-focused approach to child and parent mental health, neurodevelopmental and money/housing problems, has never previously been tested. Therefore, there are several areas of uncertainty that need to be addressed before moving onto a definitive RCT. Trial registration {2a and 2b} Registered in ClinicalTrials.gov Identifier: NCT06003582. Co-production and Feasibility RCT of Intervention to Improve the Mental Health of Children with a Social Worker. Registered 22/08/2023. https://classic.clinicaltrials.gov/ct2/show/NCT06003582

Recombination of H-2 by Raman association in the early universe

Contains fulltext : 35447.pdf (publisher's version ) (Open Access)We investigate the contribution that Raman association makes to H-2 production in the early universe at redshifts 10 <= z <= 10(4). The Raman process involves inelastic scattering of electromagnetic radiation off two colliding hydrogen atoms, taking away kinetic and binding energy and leaving bound H-2. We calculate the inelastic cross sections and rate coefficients for this process and determine the Raman association rate in the cosmic background radiation field present during the early stages of the universe. A comparison with other H-2-forming reactions is made